PFIZER AND MODERNA VACCINES CONFER LASTING IMMUNITY


MarketWatch – The vaccines developed by Pfizer with German partner BioNTech and Moderna using mRNA technology may offer protection against the coronavirus-borne illness COVID-19 for years, according to a new study published Monday.

The study, conducted by researchers at Washington University in St. Louis, and to be published in Nature, suggests that people vaccinated with those shots may not need boosters, as long as the virus does not mutate or give rise to new vaccine-resistant variants. It also found that people who have recovered from COVID before being vaccinated “produced the most robust serologic responses,” showing they enjoy a strong immune response.

Separately, an Oxford University study found that a third dose of the AstraZeneca vaccine administered more than six months after the second could boost protection against COVID-19. The researchers found that a third dose leads to a substantial increase in antibodies and induces a strong boost to immune response against the virus, including variants. The findings, which have not yet been peer-reviewed, were published in a preprint study on Monday.

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