Regarding the duration of the immunity conferred by the vaccine, Bourla reportedly said that “we have to wait [in order to gather more data] now we need to wait for a year to see if people remain immune and afterwards two years. The good news is that if we see it decline, we know that with a single additional dose is enough to increase immunity again and thus maintain it.”

Data on vaccine’s ability to block Covid-19 transmission ‘promising’, Pfizer says _ share and stock market news from Hargreaves Lansdown