Changing guidance around COVID-19 vaccines, specifically, has been central to RFK Jr.'s run as health secretary. A judge just struck some of it down.
Questions about the COVID-19 shot abound as federal recommendations shift and medical groups issue clashing guidance.
Technologists have been working to create digital apps to easily show a person’s COVID-19 vaccine certification, but there are still key issues that experts say will make it unlikely the apps become ...
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