Hi, Welcome to Health care magic forum.
It appears that the source of water is the problem at that place, Your husband is out for work, most of the time so he is not effected.
Boil the water, and use for drinking, don't use any out side foods,and stored foods.
I usually prescribe to my patient with such symptoms
domperidone, for vomitings, 10mg for adults and fractions to the children according to the age. ofoxacin, 200,or 100 according to the age.
loperamide for loose motions.
If it is well water try to chlorinate periodically.
I advise you to seek the
medical help,when the condition is out of control.
Take more of green leafy vegetables, pulses, sprouts,and
protein rich foods to have resistance against the infections.
Wishing for a quick and complete recovery. Thank you.