grndzro is discussing:

Anti-immigration memes make sweeping speculations about epidemiology that are not supported by rational science.

Soon we'll be forced to take our vaccines to protect us from the immigrants that walk across the border. They'll manufacture some deadly doomsday virus...and then most of the US will be wiped out by antivirus contamination.

No better way to hide an extermination than behind well meaning actions, and fear.