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https://www.vox.com/2020/12/15/22176957/covid-19-vaccine-coronavirus-today-explainedCan people get Covid-19 between the two doses?
Yes. Both the Moderna vaccine and the Pfizer/BioNTech vaccine are two-dose vaccines administered about several weeks apart.
Last week, before Pfizer/BioNTech received their emergency use authorization from the FDA, they released some of their data showing their trial pool. The data showed that they had about 160-some people who got infected with Covid-19 in the placebo group and about nine people that got infected in the group that got the vaccine.
But if you look at when they got infected, most of those nine people were infected just a few days after they received the first dose of the vaccine. So between the first and second dose, building up an immune response is something that can take several days up to a couple of weeks. It's likely that they were still vulnerable in that window where they were infected. Basically, the vaccine hadn't kicked in yet, and so they were able to get infected and get sick in that specific time frame.
Can people get Covid-19 after receiving both doses of the vaccine?
Yes. There were a couple of people that, I think, were reported to have received the vaccine to have come down with Covid-19 after getting the second dose. Those will have to be investigated further; that's why we don't say this vaccine is 100 percent effective. Ninety-five percent effective is still very high. But it also means that not every single person who gets a vaccine is ultimately going to have protection, which means we still have to take some precautions even after getting vaccinated