But they do provide protection against the more common strains of the Streptococcus pneumonia bacteria, which is why the Government encourages and subsidizes pneumococcal vaccination for Singaporean children and seniors.
Professor Julio Ramirez, chief research scientist at the Norton Infectious Diseases Institute at Norton Healthcare in the United States, who was the principal investigator in studies of the PCV13 vaccine, was brought in by Pfizer for the launch of the PCV20 here on Saturday. Associate Professor Lim Poh Lian, who heads the Travelers’ Health and Vaccination Clinic at Tan Tock Seng Hospital and is also a senior consultant at the National Centre for Infectious Diseases, said: “Conjugate vaccines like PCV13 or PCV20 are better able to stimulate an immune response compared to the polysaccharide vaccine PPSV23, which was the reason conjugate vaccines were developed.
While Dr Asok Kurup, who chairs the Chapter of Infectious Disease Physicians, agrees that the wider coverage from PCV20 can mean just a single dose for the vast majority, he said people at higher risk, such as the immunocompromised, should still get the PPSV23 as well, as it covers more strains. An MOH spokesman said those who have been recommended to receive the PCV13 and PPSV vaccines under the National Adult Immunization Schedule are advised to do so. The PCV20 is currently not for use in children.
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