Nine fully vaccinated members of the New York Yankees — including one player and eight other staff — tested positive for the virus that causes covid-19 last week. To many, this may suggest the vaccines, which are extremely effective, don’t work as well as advertised. In fact, the Yankees outbreak is a case study showing how well the vaccines are working.
Let’s first note that data from tens of thousands of people enrolled in clinical trials — and hundreds of millions of other partially or fully vaccinated people — have shown that the vaccines administered in the United States are safe and effective. All the cases on the Yankees came from its traveling party — the group of players and other personnel who go to road games, about 50 to 60 people. That’s not enough to overrule the existing data.
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But even if we focus just on those 50 to 60 people, does this outbreak cast doubt on vaccines? No. Of the nine cases, at least seven showed no symptoms. The only one who has so far was the first case to appear, third-base coach Phil Nevin. It is possible we will find out the vaccine “failed” only once — in Nevin — allowing him to build up a high enough viral load to spread it to eight others, all of whose vaccinated bodies likely fought it off quickly before they could develop symptoms or transmit it.
That is the vaccines working as designed. While they don’t eliminate the possibility of becoming infected, they virtually eliminate the risk of severe disease and death by preparing your immune system to fight the virus so it can respond more quickly and strongly. Cases that would have been hospitalizations become colds, and symptomatic cases become asymptomatic. Most infections are avoided entirely. The vaccine works like a strong head wind from the outfield, turning homers into doubles and doubles into harmless fly outs. These effects may be the result of a more powerful immune response in vaccinated individuals, which is also thought to reduce viral loads and thus further spread of the virus.
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