In a separate trial in Serbia, 29% of 150 participants were found to have zero antibodies against the virus even after three months. In addition, the average age of the people who participated in the Serbian study was higher than 65.
As scientists and health experts worldwide discuss the possible lab origin of the Covid-19 pandemic, the Washington Post has silently edited out one of its reports that had mocked US Senator Tom Cotton's assertion about a possible lab-leak in Wuhan.