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Dozens of viruses exist in the coronavirus family, but only seven afflict humans. Four are known to cause mild colds in people, while others are more novel, deadly, and thought to be transmitted from animals like bats and camels. Health officials have labeled this new virus SARS-CoV-2 and its disease COVID-19.
Ian Lipkin, director of the Columbia University’s Center for Infection and Immunity, has been studying the novel coronavirus. He says sunlight, which is less abundant in winter, can also help break down viruses that have been transmitted to surfaces.
“UV light breaks down nucleic acid. It almost sterilizes surfaces. If you’re outside, it’s generally cleaner than inside simply because of that UV light,” he says.
UV light is so effective at killing bacteria and viruses; it’s often used in hospitals to sterilize equipment.
Another scholar, David Heymann from the London School of Hygiene and Tropical Medicine, says not enough is known about this new virus to predict how it will change with different weather conditions. According to the Centers for Disease Control (CDC), people are most contagious when they’re showing symptoms. However, some experts suspect official counts may underestimate the number of infected people, saying not everyone infected will develop a severe illness.
“We’re only seeing the most severe cases,” says Weston. “There may be some infection going on that isn’t being detected.”
Many experts are saying SARS-CoV-2 will likely become endemic,joining the other existing four coronaviruses that cause mild colds, or becoming a seasonal health hazard like the flu.
To prevent contracting an illness from any virus, the World Health Organization recommends frequently washing your hands, avoiding close contact with those showing symptoms like coughing or sneezing,and seeking treatment if sick. 【題組】48. The scientists all over the world work together to find new ways to combat novel coronavirus that has already more than 200,000 people globally.
(A) assisted (B) relieved (C) affected (D) infected。
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