There were more but they weren't discovered as they were not viral and treatment was unknown and research were not done.
This is true among this age range
1. Aim to eat healthy foods at least 75% to 80% of the time
2. Eating a well balanced diet means eating a variety-of foods from each of the 5 foods groups daily, in the recommended amounts.
3. Dieting is a short term processes and a lifestyle change to long term.
4. Losing weight a lot can make problems like muscle loss and gallstones etc
5.