What makes Covid-19 delta variant such a threat? Ten questions answered

In the trials of Pfizer Inc.-BioNTech SE and Moderna Inc. vaccines, for example, we saw efficacy over 90%, meaning very few people tested positive for the virus. What was critical, though, was that vaccinated people in these trials were 100% protected against ...

from Google Alert - Business https://ift.tt/2UCtDhp
In the trials of Pfizer Inc.-BioNTech SE and Moderna Inc. vaccines, for example, we saw efficacy over 90%, meaning very few people tested positive for the virus. What was critical, though, was that vaccinated people in these trials were 100% protected against ... https://ift.tt/eA8V8J

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