Weakness and loss of consciousness.

Hello. My father has been diabetic for 20-30 years. He suddenly fell ill a few days ago and started vomiting green fluid and became so weak that he couldn't speak or get up. He has been unconscious since. Some nearby doctor suggested iv so he was given iv for a day. He is more than 75 years old. He has a fever which keeps going up and down.. Since he is old and is suffering like this ,his mind is not working properly and he isn't himself. In covid times it is very inconvenient for us to admit him to any hospital. We have been feeding him electrol, some glucose biscuits, boiled water and fever meds-mox(250mg) and ampoxin(500mg)...he hasn't vomitted for a while But is still very weak and not himself. What should be done? Please help.