Pain

A huge and undeniable evidence that viruses cause stiff necks is that they hurt like hell. What more proof do you need?

Van Leewenhook's Microscope

Edward Van Leewenhook was looking in his microscope at stiff necks in 1847, and saw lots of funny looking viruses. Maybe they weren't viruses, but maybe they were! And, maybe he didn't see them, but maybe he did. And, maybe it was just dust.

Peek-a-Boo Proof

The first evidence that a stiff neck may be caused by a virus was a lady in San Clemente Ca who was playing peek-a-BOO with her young son. She immediately came down with a stiff neck. The cause could have been the peek-a-BOO game, or a Virulent form of VIRUS! You decide.

Albert Einstein came down with a stiff neck whilst playing peek-a-BOO with his wife. At the same time he was thinking of how a virus could travel at the speed of light, another indicator of the connection of viruses, peek-a-BOO, and relativity.