I do believe these masks are also made in the US, but this situation highlights exactly why a country having its own major manufacturing base is not just an economic need but rather also a national security need. The US needs to invest in itself immediately to rebuild its lost manufacturing base.
In economic terms, under certain definitions and assumptions that are typical under modern economics, a trade war such as the current US-China trade war result in welfare losses. I believe, however, that when national security is taken into account (ie having the ability for the country to rapidly respond to productive capacity needs in a time of crisis), the trade war along with serious investment in expanding industrial capacity is likely net good.
In economic terms, under certain definitions and assumptions that are typical under modern economics, a trade war such as the current US-China trade war result in welfare losses. I believe, however, that when national security is taken into account (ie having the ability for the country to rapidly respond to productive capacity needs in a time of crisis), the trade war along with serious investment in expanding industrial capacity is likely net good.