Various versions of the claim that the World Health Organization (WHO) has secretly changed its definition of herd immunity have spread around social media in the past week. Most of these posts claim ...

The dictionary recently revised its definition of vaccine to be more detailed — and it didn’t eliminate the portion that deals with immunity. The updated definition says that vaccines stimulate the ...

Various versions of the claim that the World Health Organization (WHO) has secretly changed its definition of herd immunity have spread around social media in the past week. Most of these posts claim ...