People are choosing to mix COVID-19 vaccines to boost their previous doses, as researchers still work to determine if -- and when -- boosters may be necessary.
But some experts have questioned the accuracy of these results and note that the vaccine is still highly effective in preventing severe illness.
But some are not convinced. As many, like Gallagher, call for another dose, the city and county of San Francisco announced that anyone who received the Johnson & Johnson one-dose vaccine may get a booster shot of either the Pfizer or Moderna vaccine. On the other side of the issue is the World Health Organization, which this week said no one should get booster shots until everyone has access to their first doses.
“Which means, in some of the most vulnerable countries in the world with the weakest health systems, health care workers are working without protection … the older populations remain at high risk,” said Bruce Aylward, MD, the WHO’s senior adviser on organizational change.
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