The US Centres of Disease Control and Prevention published a study yesterday that found that third jabs of Pfizer and Moderna loose much of their effectiveness four months after they’re given. The study compared how likely vaccinated and unvaccinated people were to test positive. It found that vaccines were 87% effective for people two months after they had their third jab, but by the fourth month were only 66% effective. When the Omicron variant was dominant, third jabs were 91% effective at helping people who tested positive not need to be hospitalised for Covid-19 within two months after they were […]
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