SARS-CoV-2 Beta variant

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Countries with confirmed cases of Beta variant as of 25 June 2021
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1000+ confirmed sequences
250-999 confirmed sequences
100-249 confirmed sequences
10-99 confirmed sequences
2-9 confirmed sequences
1 confirmed sequence
None or no data available 501.V2 variant countries.svg
Countries with confirmed cases of Beta variant as of 25 June 2021
Legend:
  1000+ confirmed sequences
  250–999 confirmed sequences
  100–249 confirmed sequences
  10–99 confirmed sequences
  2–9 confirmed sequences
  1 confirmed sequence
  None or no data available

Beta variant, [1] [2] also known as lineage B.1.351, [lower-alpha 1] is a variant of SARS-CoV-2, the virus that causes COVID-19. One of several SARS-CoV-2 variants believed to be of particular importance, it was first detected in the Nelson Mandela Bay [5] metropolitan area of the Eastern Cape province of South Africa in October 2020, [6] which was reported by the country's health department on 18 December 2020. [7] Phylogeographic analysis suggests this variant emerged in the Nelson Mandela Bay area in July or August 2020. [8]

Contents

The World Health Organization labelled the variant as Beta variant, not to replace the scientific name but as a name for the public to commonly refer to. [9] [10] The WHO considers it to be a variant of concern. [9]

Mutations

Mutational profile of Beta variant
(change of amino acid only)
Gene Nucleotide Amino acid
ORF1ab C1059TT265I
G5230TK1655N
C8660TH2799Y
C8964TS2900L
A10323GK3353R
G13843TD4527Y
C14408T1P4715L
C17999TT5912I
Spike C21614TL18F
A21801CD80A
A22206GD215G
G22299TR246I
G22813TK417N
G23012AE484K
A23063TN501Y
A23403G1D614G
G23664TA701V
ORF3a G25563TQ57H
C25904TS171L
E C26456TP71L
N C28887TT205I

Footnote: 1Presented in parent lineage B.1.

Source: Tegally et al. (2020) , supplementary Fig S8

There are three mutations of particular interest in the spike region of the lineage B.1.351 genome: [12]

and a further five spike mutations which have so far generated less concern: [12]

Away from the spike region, it also carries: K1655N, SGF 3675-3677 deletion, P71L, and T205I. [13]

Scientists noted that the variant is able to attach more easily to human cells because of three mutations in the receptor-binding domain (RBD) in the spike glycoprotein of the virus: N501Y [7] [14] (a change from asparagine (N) to tyrosine (Y) [15] in amino-acid position 501), K417N, and E484K. [16] [17] Two of these mutations, E484K and N501Y, are within the receptor-binding motif (RBM) of the receptor-binding domain (RBD). [18] [19]

The N501Y mutation has also been detected in the United Kingdom. [7] [20] Two mutations found in the Beta variant, E484K and K417N, are not found in Alpha variant. Also, Beta does not have the 69-70del mutation found in the other variant. [14] [21]

Vaccine efficacy

On 4 January 2021, UK newspaper The Telegraph reported that Oxford immunologist Sir John Bell believed there was "a big question mark" over the new South African variant's potential resistance to COVID-19 vaccines, raising fears that vaccines might not work as effectively on that variant strain. [22] The same day Shabir Madhi, professor of vaccinology at the University of the Witwatersrand, commented to CBS News that "it's not a given" that the new Beta variant (501.V2 variant) would be able to evade the vaccines, but that it should be considered that they "might not have the full efficacy". [23] The additional mutations to the spike protein in Beta were raised as a concerning factor by Simon Clarke, an associate professor in cellular microbiology at the University of Reading, in that they "may make the virus less susceptible to the immune response triggered by the vaccines". [24] Lawrence Young, a virologist at Warwick University, also noted that the variant's multiple spike mutations "could lead to some escape from immune protection". [24]

The E484K amino acid change, a receptor-binding-domain (RBD) mutation, was reported to be "associated with escape from neutralising antibodies" which could adversely affect the efficacy of spike protein-dependent COVID vaccines. [25] [26] The E484K spike mutation was linked to a case of reinfection with the Beta variant of SARS-CoV-2 in Brazil, believed by researchers to be the first such case of reinfection involving this mutation. [27] The possibility of an alteration in antigenicity was referred to as an "escape mutation" from a monoclonal antibody with the capability of neutralizing the spike protein variants of SARS-CoV-2. [28] [29] This suggests that existing vaccines can and should be updated to counter the new strains without recourse to phased trials.

Janssen

In January, Johnson & Johnson, which held trials for its Janssen (Ad26.COV2.S) vaccine in South Africa, reported the level of protection against moderate to severe COVID-19 infection was 72% in the United States, but 64% in South Africa. [30] [31]

Pfizer–BioNTech

On 17 February 2021, Pfizer announced that neutralisation activity was reduced by two thirds for the Beta variant, whilst refraining from making claims about the efficacy of the vaccine in preventing illness as a result of this variant. [32]

On 16 March 2021, The South African Health Products Regulatory Authority (SAHPRA) approved the Pfizer-BioNTech vaccine (BNT162b2) for section 21 Emergency Use Authorisation. [33]

Pfizer-BioNTech vaccine Covid19 vaccine biontech pfizer 3.jpg
Pfizer–BioNTech vaccine

On 1 April 2021, an update on a South African vaccine trial stated that the vaccine was 100% effective so far (i.e., vaccinated participants saw no cases), with six of nine infections in the placebo control group being the Beta variant (lineage B.1.351). [34] However, nine days later, an Israeli study found that the variant was present even in people who had received both shots of the vaccine, its prevalence a disproportionate, eight-fold increase amongst vaccinated individuals in comparison to wild strains. [35]

On 5 May 2021, a letter summarizing results from the Qatar National Study Group for COVID-19 Vaccination showed 75% effectiveness against infection, with zero cases of severe disease. [36]

Oxford–AstraZeneca

On 6 February 2021, The Financial Times reported that provisional trial data from a study undertaken by South Africa's University of the Witwatersrand in conjunction with Oxford University demonstrated reduced efficacy of the Oxford–AstraZeneca COVID-19 vaccine (AZD1222) against the Beta variant. The study found that in a sample size of 2,000 the AZD1222 vaccine afforded only "minimal protection" in all but the most severe cases of COVID-19. [37]

On 7 February 2021, the South African government suspended the planned deployment of around 1 million doses of the vaccine whilst they examined the data and awaited advice on how to proceed. [38] The South African government subsequently cancelled the use of the vaccine, selling its supply to other African countries, and switched its vaccination program to use the Janssen COVID-19 vaccine. [39] [40]

In July 2021, following increased incidence of Beta in France, the United Kingdom - a major user of the AstraZeneca vaccine - placed additional restrictions on people travelling to the UK from France. However, the incidence in France is in its Indian Ocean territory of La Réunion, [41] as pointed out by French politician and doctor Veronique Trillet-Lenoir. [42]

BBIBP-CorV

Other African countries have begun the roll out BBIBP-CorV from Sinopharm, with Morocco, Egypt, The Seychelles and Zimbabwe starting the mass rollout. [43] So far, the vaccine has proven resistant to the Beta variant, as demonstrated in Zimbabwe. [44] On 2 February 2021, a preprint paper announced that neutralisation activity was reduced by 1.6 fold for the Beta variant. [45]

Moderna

In February, Moderna reported that the current vaccine (mRNA-1273) produced only one sixth of the antibodies in response to the South African variant compared with the original virus. They have launched a trial of a new vaccine to tackle the Beta variant. [46]

Sputnik V

The South African Health Products Regulatory Authority (SAHPRA) has confirmed that it has received documentation for the vaccine developed by the Gamaleya Institute in Russia. [47]

Sputnik V (Gam-COVID-Vac) is one of three Covid vaccines worldwide with an efficacy higher than 90% in symptomatic cases. It was found to be slightly less effective however it worked better than its rivals. A three fold reduction in VNA was found against the beta variant.

CoronaVac

CoronaVac is yet to be approved for use by the South African Health Products Authority (SAHPRA). [48] So far, Sinovac has offered to supply South Africa with 5 million doses of the vaccine. [49]

Covaxin

Covaxin has been found to be effective against the beta variant although with a three fold reduction in neutralization.

CoviVac

The CoviVac vaccine Information has not been delivered to the South African government yet. [50]

EpiVacCorona

The EpiVacCorona vaccine Information has not been delivered to the South African government yet. [51]

ZF2001

The ZF2001 vaccine Information is in the process of being delivered to the South African government. [52]

Novavax

A study on the NVX-CoV2373 Novavax vaccine showed 60% efficacy (for HIV-negative participants) in South Africa, compared to 90% efficacy in Britain. [53]

ImmunityBio

The BioVac Institute, a state-backed South African vaccine company, plans to use a deal it won to manufacture coronavirus vaccines. The contract with American based ImmunityBio Inc is currently conducting phase 1 vaccine trials with their hAd5 vaccine in the United States and South Africa. [54]

ImmunityBio and BioVac plan to distribute the vaccines throughout South Africa and Africa. [55] [56]

Epidemiology

Researchers and officials reported that the prevalence of the variant was higher among young people with no underlying health conditions, and more frequently causes serious illness in such cases than other variants. [57] [58] The South African health department also indicated that the variant may be driving the second wave of the COVID-19 pandemic in the country, as the variant spreads faster than other earlier variants of the virus. [7] [57]

Statistics

Cases by country (Updated as of 21 July 2021) GISAID [1]
CountryConfirmed casesCollection date
Angola40122 April 2021
Argentina124 April 2021
Aruba410 April 2021
Australia7328 June 2021
Austria2608 June 2021
Bahrain19 April 2021
Bangladesh5616 June 2021
Belgium1,07514 June 2021
Bosnia and Herzegovina111 February 2021
Botswana34227 June 2021
Brazil65 April 2021
Brunei120 January 2021
Bulgaria29 June 2021
Cambodia131 May 2021
Cameroon91 March 2021
Canada86021 June 2021
Chile422 May 2021
China894 June 2021
Colombia113 April 2021
Costa Rica124 May 2021
Cote d'Ivoire16 March 2021
Croatia41
Czech Republic7110 June 2021
Democratic Republic of the Congo3020 April 2021
Denmark12129 June 2021
Djibouti229 April 2021
Equatorial Guinea431 April 2021
Estonia3723 April 2021
Eswatini2623 March 2021
Finland1,12321 May 2021
France2,14923 June 2021
French Guiana27 April 2021
Gabon421 February 2021
Georgia123 May 2021
Germany2,23119 June 2021
Ghana178 April 2021
Greece1929 April 2021
Guadeloupe425 May 2021
Guam328 April 2021
Guinea Bissau11 February 2021
India20814 June 2021
Indonesia102 June 2021
Iran23 April 2021
Iraq126 February 2021
Ireland6919 April 2021
Israel24028 May 2021
Italy691 June 2021
Japan8913 June 2021
Jordan218 April 2021
Kenya17831 May 2021
Kuwait121 June 2021
Latvia913 May 2021
Lesotho1418 January 2021
Lithuania119 April 2021
Luxembourg74422 May 2021
Malawi31216 April 2021
Malaysia16110 June 2021
Malta31 June 2021
Martinique228 April 2021
Mauritius712 March 2021
Mayotte3231 January 2021
Mexico2016 May 2021
Mozambique32822 April 2021
Namibia9
Netherlands69327 May 2021
New Zealand3125 June 2021
North Macedonia110 March 2021
Norway36211 June 2021
Pakistan355 June 2021
Panama212 January 2021
Philippines1,2138 April 2021
Poland457 June 2021
Portugal992 June 2021
Qatar65018 May 2021
Reunion40019 June 2021
Romania726 May 2021
Russia2312 June 2021
Rwanda3915 June 2021
Saudi Arabia315 April 2021
Singapore10025 June 2021
Sint Maarten124 March 2021
Slovakia3127 May 2021
Slovenia316 April 2021
Somalia1
South Africa6,15421 June 2021
South Korea1917 April 2021
South Sudan324 April 2021
Spain58818 June 2021
Sri Lanka426 March 2021
Suriname531 March 2021
Sweden2,32217 June 2021
Switzerland22522 June 2021
Taiwan326 April 2021
Thailand4025 May 2021
Togo25 February 2021
Tunisia124 April 2021
Turkey91224 May 2021
Uganda132 April 2021
United Arab Emirates627 April 2021
United Kingdom81224 June 2021
USA2,45428 June 2021
Zambia16128 April 2021
Zimbabwe33126 February 2021
World (103 countries)Total: 28,380Total as of 21 July 2021

History

A genomics team lead by the KwaZulu-Natal Research Innovation and Sequencing Platform (KRISP) at the University of KwaZulu-Natal discovered the new variant. [59] It was uncovered by whole genome sequencing. Several genomic sequences from this lineage were submitted to the GISAID sequence database. [60] [ better source needed ]

On 23 December, UK health minister Matt Hancock announced that two people who had travelled from South Africa to the UK were infected with the Beta variant (501.V2 variant). [21] [61] On 28 December, the variant had been detected in two people in Switzerland [62] and in one in Finland. [63] On 29 December, the strain had been detected in a visitor from South Africa to Japan, [64] and in one overseas traveller to Queensland, Australia. [65] On 30 December the variant was detected in Zambia. [66] On 31 December, it was also detected in France, in a passenger returning from South Africa. [67] On 2 January 2021, the first case of this variant was detected in South Korea. [68] Austria reported their first case of this variant, along with four cases of the Alpha variant on 4 January. [69] The Republic of Botswana also detected their first case on 4 January. [70] The People's Republic of China reported the first case of this variant in southern Guangdong province on 6 January. [71]

On 8 January 2021, the Republic of Ireland reported the detection of 3 cases, all linked to travel from South Africa. [72] On the same day a case of reinfection with the new variant by a woman who had had COVID-19 was reported from Brazil, the first such reinfection reported in the world. [27] Canada reported the first case of this variant in Alberta on 9 January, [73] and Israel reported four cases, all of which were imported in people travelling from South Africa. [74] New Zealand reported the first case of this variant on 10 January. [75] [76] On 12 January, Germany reported the detection of the mutation in six people from three different households. [77] The same day, it was reported that the United Kingdom had a total of 29 cases, two of which were previously reported. [78] The following day, Belgium reported the first case in a person from West Flanders with no travel history, [79] Israel reported four further cases, [80] and Taiwan reported the first case in a Swazi man in his 30s who had tested positive for COVID-19 on 1 January. [81]

On 14 January, Germany detected a further case [82] and the following day, Canada reported a second case of the mutation which was detected in the Canadian province of British Columbia. [83] A further case was reported in Germany the same day. [84] Denmark and Réunion reported their first cases on 16 January as Israel discovered a further four cases. [85] [86] [87] On 17 January, Israel reported another four cases bringing their total number of cases of this variant to 20. [88] Two further cases were reported in The Netherlands on 18 January bringing the country's total to three. [89] Ghana reported its first case of the variant on 19 January. [90] On 23 January, Panama detected its first case of the strain in a person from Zimbabwe, who had travelled from South Africa. [91] Also on 23 January, Belgium reported at least 15 cases of the variant in Ostend, [92] while 6 cases were confirmed in the Comoros. [93] On 26 January, the Republic of Ireland reported the detection of 6 further cases. [94] The United States reported its first cases of the variant on 28 January 2021, in the state of South Carolina. [95] On 27 January, Israel reported 3 more cases which were the first cases of the variant from samples that were collected in the community randomly, without knowing the source of infection. [96] Preliminary data reported by Africa CDC on 29 January indicated that the variant had reached Ghana. [97] On 31 January, Israel reported its first case of reinfection with the new variant by a man who returned from Turkey. [98]

On 1 February 2021, the United Kingdom Secretary of State for Health and Social Care reported the random detection of 11 cases of the variant where there was no connection to international travel. [99] The same day, the Canadian province of Ontario reported the first case of the variant in the Peel Region, with a similar absence of travel history and no contact with anyone who had recently been abroad. [100] On 8 February, the Republic of Ireland reported the detection of 2 further cases. [101]

On 8 February 2021, Austria detected the greatest outbreak of Beta variant in Europe so far. A total of 293 confirmed cases and 200 suspected cases have been identified through sequencing, most of them will be confirmed in all probability. All of the cases were found in the Tirol region, where nearly 9% of the positive PCR tests were identified as the Beta variant by sequencing. [102] The active cases were estimated at around 140. After a week of public discussion and political pressure about a possible quarantine of Tirol, the government of Austria abstained from isolating the areas of concern, instead making a formal plea to reduce movement in and out of the region and go for testing after visiting Tirol. [103] Tirolean officials stated their intention to relax the lockdown rules in Tirol in keeping with the rest of Austria. [104]

On 22 February, the Israeli Health Ministry stated that the variant had been genetically sequenced in just under 1% of 3,000 community samples. [105] Later on, Israel reported a total of 444 cases of the variant, making it the highest infection rate in the world outside South Africa. [106] On 25 February, the Republic of Ireland reported the detection of 4 further cases. [107] By late February, Turkey had 49 cases of the Beta variant. [108]

On 3 March 2021, the Philippines confirmed its first 6 new cases of the South African variant, with 3 patients from Pasay with no travel history, and 3 with travel histories from Qatar and UAE. [109] On 5 March 2021, Romania reported its first two cases of the South African variant, coming from two patients in Bucharest and Pitești. [110]

On 23 March 2021, Lithuania confirmed its first 2 new cases of the South African strain, 1 in Kaunas county and 1 in Vilnius. There are 10 more suspected cases of it. The infected people said, that they didn't travel anywhere. [111] On 26 March there were 3 more cases confirmed, which means that virus is successfully spreading inside.

On 1 April 2021, Malaysia detected its first cases of South African variant. The health ministry reported two cases believed to originate from the Jalan Lima cluster, involving an employee based at the Kuala Lumpur International Airport (KLIA), with other reported cases sparsely detected within Selangor. [112] As of 1 April, a total of nine cases involving the variant is reported. [113] By 2 May, a total of 48 cases has been detected in least 5 clusters and from contact tracing, of which 20 were found in two clusters in Perak and Kelantan. [114]

On 12 April 2021 Turkey had 285 cases in 11 provinces. [115]

See also

Notes

  1. Other names include: [3] [4]
    20H/501Y.V2 (formerly 20C/501Y.V2)
    501Y.V2 variant
    South African COVID-19 variant

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