In the United States, about 33 million people and 1 in 13 children have food allergies, and nine foods cause 90% of reactions. These include milk, eggs, peanuts, tree nuts, wheat, soy, fish, shellfish ...

Chemotherapy kills fast-growing cancer cells, but it can also harm healthy cells, causing side effects that vary by health, cancer stage, and drug dose. Some effects clear quickly, while others can ...