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The study found that the effectiveness of the Pfizer and Moderna mRNA vaccines in reducing the risk of COVID-19 reached a peak of about 95 per cent two months after the first dose and then gradually declined. ....
UK Health Secretary Sajid Javid sounded an alarm over the new worst-ever super-mutant Covid variant that will make vaccines at least 40 per cent less effective, forcing flights to be banned from South Africa and five other countries. ....
The latest resurgence of Covid-19 in China has shown a tendency of spreading among schools, affecting students and kindergarten children, as at least four places have detected outbreaks related to schools and kindergartens. ....