UN says Covid-19 likely to become 'seasonal' disease

UN says Covid-19 likely to become 'seasonal' disease

Modelling studies anticipate that transmission of SARS-CoV-2, the virus that causes Covid-19 disease, "may become seasonal over time".

Covid-19 appears likely to develop into a seasonal disease, the United Nations said Thursday, cautioning though against relaxing pandemic-related measures simply based on meteorological factors.

More than a year after the novel coronavirus first surfaced in China, a number of mysteries still surround the spread of the disease that has killed nearly 2.7 million people worldwide.

In its first report, an expert team tasked with trying to shed light on one of those mysteries by examining potential meteorological and air quality influences on the spread of Covid-19, found some indications the disease would develop into a seasonal menace.

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The 16-member team set up by the UN' World Meteorological Organization pointed out that respiratory viral infections are often seasonal, "in particular the autumn-winter peak for influenza and cold-causing coronaviruses in temperate climates."

"This has fuelled expectations that, if it persists for many years, Covid-19 will prove to be a strongly seasonal disease," it said in a statement.

Modelling studies anticipate that transmission of SARS-CoV-2, the virus that causes Covid-19 disease, "may become seasonal over time".
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The experts, who focused only on outdoor meteorology and air quality conditions in the report, said laboratory studies had provided some evidence the virus survives longer in cold, dry weather and when there is low ultraviolet radiation.

But it remained unclear whether meteorological influences "have a meaningful influence on transmission rates under real world conditions".

They also highlighted that evidence around the impact of air quality on the virus remained "inconclusive".

There was some preliminary evidence that poor air quality increases Covid-19 mortality rates, "but not that pollution directly impacts airborne transmission of SARS-CoV-2".

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