So You Got Vaccinated … And Then You Got COVID. Now What? - FiveThirtyEight

Even the mRNA vaccines’ famed “95 percent efficacy” was really a measure of how well the vaccines prevented symptomatic cases.

That complication starts with some basic facts about the effectiveness of the Pfizer and Moderna vaccines currently available in the U.S.

Effectiveness is what the number is once you’re vaccinating millions more people, some of whom will be older or sicker or more likely to be exposed to a virus than trial participants.

“You have people who forget to come back for a second dose or come back late.

The CDC will be tracking real-world COVID-19 vaccine effectiveness in multiple studies, using different methodologies in different places at different times.

Other studies are just getting off the ground.

Those studies are just beginning, though, because you can’t study the vaccine until people actually start getting it.

But none of these efforts will study vaccine effectiveness by counting all the individual cases like Flint’s.

Scientists study post-introduction vaccine effectiveness for every new vaccine that comes out, said Dr.

Katherine Fleming-Dutra, a member of the Vaccine Effectiveness & Evaluation Team in the CDC’s COVID-19 Response.

The studies taught them that one dose of this vaccine wasn’t cutting it, according to Dr.

The first dose of measles vaccine is 93 percent effective.

With the second dose, the vaccine becomes 97 percent effective at preventing measles.

But that doesn’t mean we’ll have results as quickly on the COVID-19 vaccines.

That’s because a number of complications will make it harder (and possibly take longer) to do the same kinds of studies for COVID-19.

With COVID-19, scientists are looking at a disease that has a high prevalence in some places and not in others as well as rolling out brand-new vaccines.

There are other challenges to tracking the effectiveness of COVID-19 vaccines, said Emily Martin, professor of epidemiology at the University of Michigan and co-director of the Michigan Influenza Center.

That’s because the fun thing about vaccines is, “How well do they work?” isn’t just about individuals.

For example, when researchers studied the real-world effectiveness of pneumococcal vaccines, they found that rates of the disease fell among older people even though it was only children who were being vaccinated.

And vaccine effectiveness isn’t just about how many people test positive.

These studies will help us figure out what’s going on with COVID-19 as well

After all, when Flint got COVID-19, he just had a sore throat

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