A crash course in changing the world.
I would set up a hospital with plenty of food, water, medicine, and other things. We would get many people with medical experience to help the sick patients. Everyone would wear masks or other protective clothes so that they don't get sick.
Toys and board games would be donated to the sick people, so that they have something to entertain them while in hospital. We would plant crops, so the patients can have fresh food to eat.