Removes over 99.99% of Covid-19ߙ

Recent news on COVID-19 airborne threat Until now, there have been conflicting messages related to the risk of the airborne transmission of COVID-19. A group of 239 scientists in 32 countries have published […]
Recent news on COVID-19 airborne threat Until now, there have been conflicting messages related to the risk of the airborne transmission of COVID-19. A group of 239 scientists in 32 countries have published […]