3 ms·

Their actual efficacy is questionable at best though. After about 10 minutes of breathing, water vapor from your own breathing would have rendered it more or le

Their actual efficacy is questionable at best though. After about 10 minutes of breathing, water vapor from your own breathing would have rendered it more or less permeable to anything infectious. Sneezing into a handkerchief would probably be more effective.

Fins 8y ago
Efficiency is another question, it may be more of a "it's the thought that counts".
pc2g4d 8y ago
If it catches your spit when you pronounce sounds like "p" and "t", and catches your sneeze particles, it's likely to be pretty helpful.