Vaccine description | |
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Target | 23 serotypes of Streptococcus pneumoniae |
Vaccine type | Polysaccharide |
Clinical data | |
Trade names | Pneumovax 23 |
Other names | PPSV, PPV-23, PPSV23 |
AHFS/Drugs.com | Monograph |
MedlinePlus | a607022 |
License data | |
Pregnancy category |
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Routes of administration | Intramuscular |
ATC code | |
Legal status | |
Legal status | |
Identifiers | |
ChemSpider |
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KEGG | |
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Pneumococcal polysaccharide vaccine, sold under the brand name Pneumovax 23, is a pneumococcal vaccine that is used for the prevention of pneumococcal disease caused by the 23 serotypes of Streptococcus pneumoniae contained in the vaccine as capsular polysaccharides. [2] It is given by intramuscular or subcutaneous injection. [2]
The polysaccharide antigens were used to induce type-specific antibodies that enhanced opsonization, phagocytosis, and killing of Streptococcus pneumoniae (pneumococcal) bacteria by phagocytic immune cells. The pneumococcal polysaccharide vaccine is widely used in high-risk adults. [4]
First used in 1945, the tetravalent vaccine was not widely distributed, since its deployment coincided with the discovery of penicillin. [5] In the 1970s, Robert Austrian championed the manufacture and distribution of a 14-valent pneumococcal polysaccharide vaccine. [6] [7] This evolved in 1983 to a 23-valent formulation (PPSV23). A significant breakthrough affecting the burden of pneumococcal disease was the licensing of a protein conjugate heptavalent vaccine (PCV7) beginning in February 2000. [8]
In the United States, pneumococcal vaccine, polyvalent is indicated for active immunization for the prevention of pneumococcal disease caused by the 23 serotypes contained in the vaccine (1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19F, 19A, 20, 22F, 23F, and 33F). [3] [2] It is approved for use in people 50 years of age or older and people aged two years of age or older who are at increased risk for pneumococcal disease. [2] [9] The World Health Organization (WHO) recommendations are similar. The WHO does not recommend use of pneumococcal polysaccharide vaccine in routine childhood immunization programs. [10] [11] The recommendations in the UK are similar, but include people with occupational hazards. [12]
Pneumococcal vaccine may be beneficial to control exacerbations of chronic obstructive pulmonary disease (COPD). [13]
The pneumococcal polysaccharide vaccine is important for those with HIV/AIDS. In Canadian patients infected with HIV, the vaccine has been reported to decrease the incidence of invasive pneumococcal disease from 768 per 100,000 person–years to 244 per 100,000 patient–years. [4] Because of the low level of evidence for benefit, 2008 WHO guidelines do not recommend routine immunization with PPV-23 for HIV patients, and suggests preventing pneumococcal disease indirectly with trimethoprim–sulfamethoxazole chemoprophylaxis and antiretrovirals. [10] While the U.S. Centers for Disease Control and Prevention (CDC) recommends immunization in all patients infected with HIV. [14]
The most common adverse reactions (reported in more than 10% of subjects vaccinated with pneumococcal polysaccharide vaccine in clinical trials) were: pain, soreness or tenderness at the site of injection (60.0%), injection-site swelling or temporary thickening or hardening of the skin (20.3%), headache (17.6%), injection-site redness (16.4%), weakness and fatigue (13.2%), and muscle pain (11.9%). [2]
The 23-valent vaccine (for example, Pneumovax 23) is effective against 23 different pneumococcal capsular types (serotypes 1, 2, 3, 4, 5, 6B, 7F, 8, 9N, 9V, 10A, 11A, 12F, 14, 15B, 17F, 18C, 19A, 19F, 20, 22F, 23F, and 33F), and so covers 90 percent of the types found in pneumococcal bloodstream infections. [2]
Children under the age of two years fail to mount an adequate response to the 23-valent adult vaccine, and instead a 13-valent pneumococcal conjugated vaccine (PCV13; for example, Prevnar 13) is used instead. PCV13 replaced PCV7, adding six new serotypes to the vaccine. While this covers only thirteen strains out of more than ninety strains, these thirteen strains caused 80–90 percent of cases of severe pneumococcal disease in the U.S. before introduction of the vaccine, and it is considered to be nearly 100 percent effective against these strains. [15]
Age | 2–6 months | 7–11 months | 12–23 months |
PCV13 | 3 × monthly dose | 2 × monthly dose | 2 doses, 2 months apart |
Further dose in second year of life | |||
PPSV-23 | Single dose after second year of life, 2 months after PCV13 |
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A conjugate vaccine is a type of subunit vaccine which combines a weak antigen with a strong antigen as a carrier so that the immune system has a stronger response to the weak antigen.
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Varicella vaccine, also known as chickenpox vaccine, is a vaccine that protects against chickenpox. One dose of vaccine prevents 95% of moderate disease and 100% of severe disease. Two doses of vaccine are more effective than one. If given to those who are not immune within five days of exposure to chickenpox it prevents most cases of disease. Vaccinating a large portion of the population also protects those who are not vaccinated. It is given by injection just under the skin. Another vaccine, known as zoster vaccine, is used to prevent diseases caused by the same virus – the varicella zoster virus.
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Meningococcal vaccine refers to any vaccine used to prevent infection by Neisseria meningitidis. Different versions are effective against some or all of the following types of meningococcus: A, B, C, W-135, and Y. The vaccines are between 85 and 100% effective for at least two years. They result in a decrease in meningitis and sepsis among populations where they are widely used. They are given either by injection into a muscle or just under the skin.
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George Rainer Siber is a medical researcher and vaccine expert with 48 years of experience in developing numerous vaccines, therapeutic antibodies, and diagnostic agents for infectious diseases.
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