the petri dish shows bacterial growth, not viruses.
Viruses are 4 orders of magnitude smaller than bacteria. An N95 mask is effective in filtering particles bigger than 3 microns. The Virus is 0.2 to 0.05 microns...
Even with mask you can see bacterial growth on all cases except the two coughs.
All this proves is that if we all needs masks now, we've always needed to wear masks and will always in the future....
Sorry but no thanks to that...
the petri dish shows bacterial growth, not viruses.
Viruses are 4 orders of magnitude smaller than bacteria. An N95 mask is effective in filtering particles bigger than 3 microns. The Virus is 0.2 to 0.05 microns...
Even with mask you can see bacterial growth on all cases except the two coughs.