Least reassuring sign

The impact of the outbreak on the U.S. Hygienic Laboratory, with 16 of its workers affected, including two deaths, led to the formation of the National Institute of Health.

Wow! Today I learned.

I expected killer birds or something, this is kind of a downer but not your fault. Thanks anyway

No, this is obviously interesting. Thanks alot!

Interesting

My initial guess was that the parrots were taught some foul language, and sign was to assure parents that their kid's ears were safe