Lol, I live in San Diego right now with the Hepatitis A outbreak, but to the question, you should wash your hands regularly and if you happen to have it you should contact officials immediately. All people that have come in contact with that person who is carrying it should get tested as soon as possible.
Hope this helped you :)
-Warning2
Carrots and lentils would be a source of Vitamin A
Adults can take more time to process their intake and they have to be careful about what they eat. But teenagers on the other hand have more energy and have faster working systems