Vietnam has very few cases of Covid-19, especially given its population and proximity to China.
One of the reasons why was because they had some of the strongest containment measures in the entire world. One of the strategies they did early on was to have a very strict quarantines of villages/regions known to have infections. They would quarantine second and third degree connections to people who were infected. It may seem extreme, but given the fact that the number of total infections is fewer than 500, it's hard to argue that it wasn't effective.
One of the reasons why was because they had some of the strongest containment measures in the entire world. One of the strategies they did early on was to have a very strict quarantines of villages/regions known to have infections. They would quarantine second and third degree connections to people who were infected. It may seem extreme, but given the fact that the number of total infections is fewer than 500, it's hard to argue that it wasn't effective.