People who are allergic to penicillin are often prescribed much stronger antibiotics, increasing antibiotic resistance and their risk for serious drug-resistant infections, but fewer than 1 percent of people believed to be allergic to penicillin are tested.

Research suggests that such red meat allergies, sometimes caused by a tick bite, increase plaque buildup in arteries and can increase the risk for heart disease.

Researchers at King’s College London in England have developed a new blood test to diagnose peanut allergies that may be safer, more accurate, and less expensive than existing tests.

Here are the best and worst places to live with spring allergies based on pollen counts, medication needs, and number of allergy specialists.

If you are hypothyroid, it’s important to be aware of this specialized form of levothyroxine as a treatment option.