Friday, April 24, 2020
Sunlight, Heat & Humidity May Kill Covid-19
There was some very reassuring news at yesterday's daily White House press conference concerning Covid-19. Bill Bryan, the science and technology advisor for Homeland Security, reported on studies being conducted by the Science and Technology Department showing that sunlight, can seriously weaken Covid-19 in about two minutes. At lesser intensities, it takes a little longer. In addition to the ultra violet rays from sunlight, heat and humidity also play a role in weakening and killing Covid-19. "The virus dies the quickest in direct sunlight," said Bryan.
Bryan did caution that these are "emerging" results, but they certainly are encouraging.
Indoors, Bryan reports the virus is destabilized by increasing the temperature and humidity. Because sunlight impedes virus transmission, he recommends outdoor activities. But he cautions, ""It would be irresponsible for us to say that we feel the summer is just going to totally kill the virus … that is not the case."
He added that isopropyl alcohol kills the virus in 30 seconds.
These findings are corroborated by a Japanese study showing that respiratory viruses diminish with increased heat and humidity. Of course, the virus could return when temperatures and humidity drop and sunlight fades. That study was conducted before the Covid-19 pandemic. Covid-19 is a respiratory virus.
Given this data, local municipal officials should consider re-opening parks.
Listen to the science.