Great suggestions.
People helping others should not forget themselves. Although Blast is far more knowledgeable than I am in prepping, there is no harm in reminding him and others to take supplements (multivitamins ..etc.) to boost his immune system.

I remember the days we were caring for our elderly dad, my older brother started showing signs of poor health and I emphasized to him to take enough rest, multivitamin tablets and be extra careful with cleaning dad's bed-related blisters.

Your job , serving survivors in these conditions, requires that you take extra care of yourself.

God bless.