People getting the two-dose COVID vaccine are issued a card, which they need for the second shot. Some are proudly posting it on social media. Author Adam Levin, founder of Cyber Scout, says this is a bad idea.

<p>People getting the two-dose COVID vaccine are issued a card, which they need for the second shot. Some are proudly posting it on social media. Author Adam Levin, founder of Cyber Scout, says this is a bad idea.</p>

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