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Coronavirus shown to spread in high heat and humidity-New study say the opposite

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  • Coronavirus shown to spread in high heat and humidity-New study say the opposite

    Coronavirus shown to spread in high heat and humidityBy Dr. Liji Thomas, MDMar 30 2020

    A new study explores the possibility that the novel coronavirus, which is ravaging the world, can spread in hot and humid conditions, dispelling the view held by some investigators that the virus is more easily transmissible in colder climates.

    The study published in the JAMA Network Open examines the possibility that the virus could have been spread by one infected person to 8 other people and showed no signs of weakening in warm and humid conditions. All nine people having used or worked at the same indoor public bath center....

    The study

    The study centered on nine people from Huai’an city, 700 km northeast of Wuhan, in Jiangsu province, China, who were admitted to hospital between January 25, 2020, to February 10, 2020. Testing for SARS-CoV-2 was undertaken by performing quantitative reverse-transcription polymerase chain reaction (QRT-PCR) on samples from throat swabs collected from all patients. Computed tomography (CT) and blood examinations were also carried out to confirm the diagnosis.
    The findings

    The bath center had a swimming pool, showers, and sauna, with an area of about 300 square meters, 60% humidity, and a temperature between 25 C and 41 C. The index patient had visited Wuhan, and on his return showered at the bath center on January 18, 2020. The next day he developed a fever. He was confirmed to be COVID-19 positive on January 25, 2020.

    The next seven patients had all used one of the facilities in the same center between January 19 and 24. All developed symptoms 6-9 days later. The last patient was working in the center and became symptomatic on January 30. All the patients were young, about 35 years old, on average.

    The infection was confirmed by qRT-PCR in all cases. The other investigations supported the diagnosis. None of the patients required ventilatory support....
    Last edited by Treyfish; April 23rd, 2020, 05:43 PM.

  • #2
    Rapid Expert Consultation on SARS-CoV-2 Survival in Relation to Temperature and Humidity and Potential for Seasonality for the COVID-19 Pandemic (April 7, 2020)

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    National Academies of Sciences, Engineering, and MedicineDescription

    In response to a request from the Office of Science and Technology Policy (OSTP), the National Academies of Sciences, Engineering, and Medicine convened a standing committee of experts to help inform OSTP on critical science and policy issues related to emerging infectious diseases and other public health threats. The standing committee includes members with expertise in emerging infectious diseases, public health, public health preparedness and response, biological sciences, clinical care and crisis standards of care, risk communication, and regulatory issues. This publication responds to questions concerning virus survival in relation to temperature and humidity, and potential for seasonal reduction and resurgence of cases.
    TopicsSuggested Citation

    National Academies of Sciences, Engineering, and Medicine. 2020. Rapid Expert Consultation on SARS-CoV-2 Survival in Relation to Temperature and Humidity and Potential for Seasonality for the COVID-19 Pandemic (April 7, 2020). Washington, DC: The National Academies Press. this citation to:Publication Info

    8 pages | 8.5 x 11


    • #3
      Coronavirus Dies Fastest Under Light, Warm and Humid Conditions
      4m ago

      Justin Sink, Bloomberg News
      (Bloomberg) -- The coronavirus doesn’t last as long on door handles and other nonporous surfaces when it’s exposed to sunlight, higher temperatures and humidity, according to a U.S. government study.

      “The virus is dying at a much more rapid pace” from exposure to humidity or heat,...


      • #4
        US government says Covid-19 lives for just 2 minutes on sunny surfaces above 21c (70f)
        Jimmy McCloskeyThursday
        23 Apr 2020 11:26 pm
        Coronavirus virus particles live for just two minutes on sunny surfaces when temperatures are 70f (25c) and above, a leading US scientist said on Thursday. Department of Homeland Security Science and Technology Directorate boss Bill Bryan revealed the powerful combination of UV light and warmer temperatures on Covid-19 while flanked by Donald Trump at the White House Thursday.

        He said: ‘Our most striking observation to date is the powerful effect solar light seems to have on killing the virus, both surfaces and in the air. We’ve seen a similar effect with temperature and humidity as well, where increasing the temperature and humidity – or both – is generally less favorable to the virus.’

        Bryan explained that the half life – the time it takes for the number of virus particles to decay and halve in number dramatically decreases as the weather warms up, sparking hopes warmer summer conditions could dramatically reduce the number of coronavirus infections and deaths.....


        • #5
          Administration study finds high temperatures, humidity, and sunlight kill the coronavirus

          by Cassidy Morrison
          | April 23, 2020 06:49 PM

          A Trump administration study found that heat, humidity, and sunlight make it harder for the coronavirus to survive on surfaces and in the air.

          The study found that exposure to sunlight, high heat, and humidity cuts the half-life of the virus on surfaces from up to 18 hours to a matter of minutes.

          When the virus is exposed to sunlight, in addition to temperatures above 75 degrees with a humidity of about 80%, it can die in minutes...

          "If you inject ... the sun, the half-life goes from six hours to two minutes," Bryan said. "That's how much of an impact the UV rays has on the virus."