If it is a true/false question. Answer would be true. Some people never show symptoms, others show them within 7 days and for others it shows in about 30 days.
Answer:
stop all the factory or ruduce the number of them
I would Add vegetables to your favorite meal , Keep fresh fruits out in a bowl and Store chopped vegetables in the refrigerator you know if that doesn't work you can just shove it in their mouth and say EAT IT ITS GOOD FOR YOU