Aren't they willing or not able to?
Must say the poorest people here plus those living on the streets and those always outside are never ill. In a way they are more resistand even with a huge lack of hygiene. The shepherds here never wash their clothes I bet they sleep in it. Once a year a haircut, same clothes/shoes till it falls apart. Never been sick or absent for a day in at least the past ten years.

Do what feels best for you it's your body, your choice. 🍀♥