Why COVID-19 origin remains a mystery

Source: Xinhua| 2020-12-02 19:26:43|Editor: huaxia

Scientists have found new clues to the early traces of the virus that causes the #COVID19 #pandemic. But the exact origin of it is still shrouded in mystery.

KEY WORDS:
EXPLORE XINHUANET
010020070750000000000000011102121395585951