Someone in my family has tested positive for Corona and there’s nobody else other in my family to take care of her. My family is asking me to not fast as it wouldn’t be right for her to ask for food etc from someone who’s fasting that is me. What should I do? I tried to convince them but they don’t agree.

And this time as well my family was not okay with me fasting because I have weak immunity and I fall sick very often and have fallen sick to multiple diseases in past. So with a Corona patient in home, they said they couldn’t risk it.

Your family cannot order you to do against what is wajib. You can take care of your sick family member (which would have great rewards) and there is nothing wrong in asking food from someone who is fasting.

If you give a valid probability that fasting would cause you to become sick then you don't have to fast