According to this article, it seems clear by now that low oxygen is in fact dangerous even when you feel fine, so buying a pulse oximeter is useful.
https://www.nytimes.com/2020/04/20/opinion/coronavirus-testing-pneumonia.html
According to this article, it seems clear by now that low oxygen is in fact dangerous even when you feel fine, so buying a pulse oximeter is useful.
https://www.nytimes.com/2020/04/20/opinion/coronavirus-testing-pneumonia.html