Self-quarantine is a very important part of journey to deal with Corona Virus. There can be instances where  people in self quarantine might need help with basics around household stuff, groceries etc. which they cannot step out to get. A portal where patients can post for help and then people in the vicinity can offer for help. Then based on the responses the patient can choose any one to help and provide additional details like address , contact details as required.

I'd make it also for medical staff. They work overtime and shouldn't go to public and crowded places like the supermarket. They also need help. Having a bag of groceries ready at the door is a life-saver at the end of a working day.