Mild illnesses include some cases of the common cold , while more lethal varieties can cause SARS, MERS, and COVID-19. Symptoms in other species vary: in chickens, they cause an upper respiratory tract disease, while in cows and pigs they cause diarrhea.
Death of doctor who warned about coronavirus triggers national backlash over China’s censorship
The death of Li Wenliang, the Chinese doctor who warned about coronavirus, has triggered a national backlash over freedom of…
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