According to researchers from Quebec, Illinois, and Texas, to prevent the spread of COVID-19 indoors, the two metres physical distancing guideline is not enough without masks.
South Korea's health ministry said Sunday that it will apply new four-tier social-distancing guidelines next month from the current five-tier scheme in a bid to adopt a more sustainable quarantine campaign.
1680354055_480X320.jpg)
1610428937_480X320.jpg){kind=spacer}
