Saturday, May 9, 2020

Temperature and Latitude Have No Affect in Spread of COVID-19



Temperature and latitude do not appear to be associated with the spread of coronavirus disease 2019 (COVID-19), according to a study of many countries published in CMAJ (Canadian Medical Association Journal), but school closures and other public health measures are having a positive effect.

According to the authors, "Epidemic growth of COVID-19 was not associated with latitude and temperature, but may be associated weakly with relative or absolute humidity. Conversely, public health interventions were strongly associated with reduced epidemic growth."

"Our study provides important new evidence, using global data from the COVID-19 epidemic, that these public health interventions have reduced epidemic growth," says Dr. Peter Jüni, Institute for Health Policy, Management and Evaluation, University of Toronto, and St. Michael's Hospital, Toronto, Ontario.
Coronavirus Disease 2019 (COVID-19) illustration
Credit: CDC

The Canadian study looked at 144 geopolitical areas -- states and provinces in Australia, the United States and Canada as well as various countries around the world -- and a total of more than 375 600 confirmed COVID-19 cases. China, Italy, Iran and South Korea were excluded because the virus was either waning in the case of China or in full disease outbreak at the time of the analysis in others. To estimate epidemic growth, researchers compared the number of cases on March 27 with cases on March 20, 2020, and determined the influence of latitude, temperature, humidity, school closures, restrictions of mass gatherings and social distancing measured during the exposure period of March 7 to 13.

They found little or no association between latitude or temperature with epidemic growth of COVID-19 and a weak association between humidity and reduced transmission. The results -- that hotter weather had no effect on the pandemic's progression -- surprised the authors.

"We had conducted a preliminary study that suggested both latitude and temperature could play a role," says Dr. Jüni. "But when we repeated the study under much more rigorous conditions, we got the opposite result."

The researchers did find that public health measures, including school closures, social distancing and restrictions of large gatherings, have been effective.

"Our results are of immediate relevance as many countries, and some Canadian provinces and territories, are considering easing or removing some of these public health interventions," says Dr. Jüni.

"Summer is not going to make this go away," says Prof. Dionne Gesink, a coauthor and epidemiologist at Dalla Lana School of Public Health. "It's important people know that. On the other hand, the more public health interventions an area had in place, the bigger the impact on slowing the epidemic growth. These public health interventions are really important because they're the only thing working right now to slow the epidemic."

The authors note several study limitations, such as differences in testing practices, the inability to estimate actual rates of COVID-19 and compliance with social distancing.

When deciding how to lift restrictions, governments and public health authorities should carefully weigh the impact of these measures against potential economic and mental health harms and benefits.


Contacts and sources:
Kim Barnhardt


Publication: Impact of climate and public health interventions on the COVID-19 pandemic: A prospective cohort study
Peter Jüni, Martina Rothenbühler, Pavlos Bobos, Kevin E. Thorpe, Bruno R. da Costa, David N. Fisman, Arthur S. Slutsky and Dionne Gesink
CMAJ May 08, 2020 cmaj.200920; DOI: https://doi.org/10.1503/cmaj.200920 http://www.cmaj.ca/lookup/doi/10.1503/cmaj.200920








3 comments:

  1. God bless Dr. USELU for his marvelous work in my life, I was diagnosed of HERPES SIMPLEX VIRUS since 2018 and I was taking my medications, I wasn't satisfied i needed to get the HERPES out of my system, I searched about some possible cure for HERPES i saw a comment about Dr. USELU , how he cured HERPES with his herbal medicine, I contacted him and he guided me. I asked for solutions, he started the remedy for my health, he sent me the medicine within 3 days. I took the medicine as prescribed by him and 2weeks later i was cured from HERPES contact him via email (dr.uselucaregiver@gmail.com) once again thanks to you Dr. USELU cure the flowing virus, contact his email or add him on whatsapp (+2349019328641) cancer cure
    diabetes cure
    ringing ear
    herpes cure
    warts cure
    HPV cure
    HIV cure
    get your ex back
    pregnancy herbal medicine
    Hepatitis  

    ReplyDelete
  2. God bless Dr. USELU for his marvelous work in my life, I was diagnosed of HERPES SIMPLEX VIRUS since 2018 and I was taking my medications, I wasn't satisfied i needed to get the HERPES out of my system, I searched about some possible cure for HERPES i saw a comment about Dr. USELU , how he cured HERPES with his herbal medicine, I contacted him and he guided me. I asked for solutions, he started the remedy for my health, he sent me the medicine within 3 days. I took the medicine as prescribed by him and 2weeks later i was cured from HERPES contact him via email (dr.uselucaregiver@gmail.com) once again thanks to you Dr. USELU cure the flowing virus, contact his email or add him on whatsapp (+2348132015009) cancer cure
    diabetes cure
    ringing ear
    herpes cure
    warts cure
    HPV cure
    HIV cure
    get your ex back
    pregnancy herbal medicine
    Hepatitis

    ReplyDelete
  3. Investing online has been a main source of income,that's why knowledge plays a very important role in humanity,you don't need to over work yourself for money.All you need is the right information,and you could build your own wealth from the comfort of your home!Binary trading is dependent on timely signals,assets or controlled strategies which when mastered increases chance of winning up to 90%-100% with trading. It’s possible to earn $10,000 to $20,000 trading weekly-monthly,just file a complaint with  Robert,I had almost given up on everything about binary trading and ever getting my lost funds back,till i met with him,with his help now i have my lost funds back to my bank account and I can now trade successfully with his profitable strategies and software!! Email: Robertseaman939@gmail.com or Fb.me/investandmakemoney1 or  whatsApp: +44 7466 770724

    ReplyDelete