American researchers have established for the first time the seasonality of the coronavirus. Unfortunately, it is quite possible that a new wave of Covid-19 will hit this winter when the weather change in the northern hemisphere.
Ideal conditions for development
A new study by the University of Virginia estimates that the coronavirus has hit cities in a latitude band between 30 ° and 50 ° north the hardest. Among these cities, we find Wuhan (China), Tokyo (Japan), Daegu (South Korea), Qom (Iran), Milan (Italy), Paris (France), Seattle and Washington (United States) as well as Madrid. The distribution of important COVID-19 outbreaks in terms of latitude, temperature and humidity levels matched the behavior of seasonal respiratory viruses,” the study said.
According to the study leaders, the cities cited had temperatures between 5 and 10.5 degrees ° C and relative humidity between 44 and 84% at the time of the release of Covid-19. In addition, the study evokes the case of 42 other cities that have obviously avoided the worst. However, these are located either south or north of this band of latitude.
Covid-19 present every winter?
The researchers said that cold-causing coronaviruses in humans are highly seasonal in winter. The fact is, these same coronaviruses are undetectable during the summer months. In other words, Covid-19 may also be seasonal, just like the flu that rages in winter between December and April in countries of the northern hemisphere. The same flu reached the southern hemisphere between June and September. In the tropics, the absence of winter rhymes with the appearance of several strong episodes (waves). Researchers believe that the Covid-19 may continue to operate on this scheme in the future.
The study leaders also raised another possibility. Public health efforts could eradicate Covid-19 in the tropics and the southern hemisphere, as was the case with SARS in 2003. However, the current increase in cases worldwide makes this a possibility. less and less likely. Finally, monitoring Covid-19 in countries such as New Zealand, Argentina, Chile and even South Africa could help countries in the North prepare for a new epidemic wave.
Hugues Louissaint is an entrepreneur and writer, living in the US for over a decade. He has launched successful products such the Marabou Coffee brand, which has been highly successful in Florida. He has also been a writer for more than 5 years focusing on science, technology, and health. He writes part-time for the Scientific Origin and provides valuable input on a wide range of subjects.