KEY POINTS
  • Dr. Kavita Patel told CNBC on Friday some precautions are needed even after people are being fully vaccinated against Covid.
  • That's because more information is still required on whether vaccinated people can give the virus to someone who hasn't been inoculated, she said.
  • However, the former Obama administration policy aide said the "good news" is that smaller gatherings among fully vaccinated people will become safer.

Even after being fully inoculated against Covid, some public health precautions are still needed until more data on the vaccines can be collected, Dr. Kavita Patel told CNBC on Friday.

It's well understood the two-shot vaccines from Pfizer and Moderna are highly effective at preventing severe disease and death from Covid-19, Patel said in a "Squawk Box" interview. Less understood right now is how well the vaccines reduce transmission of the coronavirus.