Not for long: Cloth and paper masks block some pollutants for a few minutes. After that they are more humid and less able to block. Additionally, they are less able in general to block really small particles when wet, like viruses and nano particles of pollution. Thus it is essential to build up your internal immune system as much as possible.
Answered 2/11/2013
5.3k views
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
6 doctors weighed in across 3 answers
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question