Those were all people who were stopped at the borders
Vietnamese attribute the country’s success to the “Honda effect:” “We’re a people who go everywhere on Honda motorcycles. We’re accustomed to wearing masks to keep out the dust. I think that is what saved us this time.”
Vietnam made use of the lessons it learned from the SARS outbreak. As soon as an infected person was identified, he or she was placed in a state-owned facility such as a university dormitory or military barracks. All close contacts of the infected person were also placed on “stand-by” in these facilities, even if they were asymptomatic at the time. In early April, when only 240 people had been infected, 45,000 people were under quarantine. Whenever a small cluster of infections emerged, the entire village was sealed off from the outside world.
Ah yes - so you admit it wasn’t the masks but because they contained the infection to a few dozen people.
You KNOW we did that here too but the infection slipped through and spread anyway.
Oh and how do you account for all the doctors and nurses wearing N95 masks that got it anyway?