Câu hỏi:

The USA is encouraging Americans to wear face masks. There have been a lot of talks about whether or not face masks are effective in helping slow down the (37) _______ of the COVID-19 coronavirus. The government is set to encourage Americans to use homemade face covering like cloth masks, bandanas and scarves. At first, the WHO and (38) _______ health organizations recommended that people who were not sick didn't need to wear masks or cover their faces. (39) _______, it is now proved that face masks can work effectively. They point to countries like Singapore and South Korea, (40) _______ people wear masks and reported infection rates are lower.

There have been a lot of talks about whether or not face masks are effective in helping slow down the (37) _______ of the COVID-19 coronavirus.