National Geographic Society
National Geographic Partners
LLC
Vila Formosa
2020Influenza
the University of São Pauloâs School of Public Health
Vitamin D
University of New Mexico
â
Measles Laboratory
the Oswaldo Cruz Institute
Siqueira
The World Health Organization
Los Alamos National Laboratory
âbecause
thereâs
â
Ana Paula Sayuri Sato
COVID
Kathryn Hanley
Zika
Marilda Siqueira
Brazilian
Southern Hemisphereâs
the Southern Hemisphere
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São Paulo
Brazil
Tuesdaây
São Paulo
Rio de Janeiro
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Also, this coronavirus strain, known officially as SARS-CoV-2, is so new that thereâs not yet enough data to say anything conclusive.âIt probably is a seasonal virus, just like other respiratory viruses, but in this first moment of propulsion, itâs still difficult to know how it will behave,â says Ana Paula Sayuri Sato, an epidemiologist at the University of São Pauloâs School of Public Health.For now, scientists can glean some early clues from known seasonal diseasesâincluding other members of the coronavirus familyâthat cause common colds every winter.Though there is no definitive answer as to why some viruses have a seasonal circulation pattern and others donât, several factors help many viral threats propagate in the winter months specifically.Many respiratory viruses, such as the common cold and flu, are more stable at cooler temperatures. Additionally, a lack of vitamin D can impair lung output and can increase the risk for respiratory diseases including asthma, tuberculosis, and chronic obstructive pulmonary disease.Even if COVID-19 cases rise significantly this year as the Southern Hemisphere heads into winter, that alone wonât prove that seasonality is the culprit.Because some known seasonal viruses have been around for a long time, enough people have developed immunities that researchers can more precisely study how those diseasesâ behavior changes over time.
As said here by Jill Langlois