Health
CDC ramps up scrutiny of rare post-vaccination ‘breakthrough infections’ – The Washington Post
The precise number of these breakthrough cases is unknown, but figures released by states suggest it is at least several thousand.

These cases represent a tiny percentage of the 66 million people fully inoculated, and experts say they are neither unexpected nor occurring at an alarming rate. Indeed, the rarity of the breakthrough illnesses in the context of the vast scale of inoculations reinforces the encouraging message from public health experts:These vaccines are highly effective, and their rollout has dramatically driven down the rates of sickness and death among the most vulnerable populations first targeted for inoculations.
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