Ex-CDC director Tom Frieden on the next COVID-19 vaccines
Americans fortunate enough to receive vaccines right now, outside of clinical trials, are getting ones made by either Pfizer or Moderna. But newly released data from Novavax and Johnson & Johnson suggests that more vaccines could be on the way. Dan digs into the news and why it matters, especially as COVID-19 variants begin to spread, with Tom Frieden, former head of the CDC.
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