It was the worst act of terrorism in our country's history and the deadliest day ever for first responders. Of the 2,700 people killed in New York City, more than 400 were firefighters, paramedics, and police officers. In the 19 years since, more than 200 first responders have died after a chronic illness. Learn more about what researchers are now looking for as they study the remains of ground zero.

According to a recent Gallup Poll, four in five Americans believe it is risky to go to healthcare facilities right now. Telemedicine provides a safer alternative, but for some technology-challenged people, that might not be an option. Learn how some doctors are bringing healthcare straight to the patients who need it the most.

It's called achalasia, where people lose the ability to swallow. It's far more serious than heartburn, acid reflux, and GERD, and it can lead to death, but a new, less invasive technique is making it possible for patients to swallow again.

Fever, chills, shortness of breath, fatigue, muscle aches, body aches, headaches, nausea, vomiting all sound like the symptoms of COVID-19, but actually, it's Lyme disease, and this year is expected to be an exceptionally bad year for ticks. In fact, because more people are spending time outdoors and in the wilderness due to the pandemic, experts said they fear more people will come down with Lyme disease. We talked with one teen who is on a mission to educate, track and cure the life-altering disease.

There have been more six million confirmed cases of COVID-19 in the United States. For those who have recovered, the path can be a long one. The more time spent in the intensive care unit and on a ventilator, the harder and longer it will be to get back to normal... or get to a new normal.

September is Thyroid Cancer Awareness Month. Ninety percent of all patients are cured if it's caught early, but for those with medullary thyroid cancer, a rare form of the disease, there have been few effective options. Now, the first young man in the country is being treated with a life-saving drug, which was at first prescribed for adults only.

Nearly two million people in the United States are living with the loss of a limb. The causes vary, from vascular disease to cancer and trauma, and it's estimated half of all amputees with powered prosthesis don't use them. They don't like how they feel or that they cannot feel. Now, the first amputees are experiencing the sense of touch.

One in 50 children is living with a disability, whether it's autism, Down syndrome, epilepsy, dyslexia, muscular dystrophy. The list goes on and on, and although living with a disability isn't necessarily rare, it can be very lonely and isolating. That's why one young woman is working to connect these kids, to show them they are not alone.

Research of the coronavirus has already determined that men, people of color, and those with underlying medical conditions are at greater risk of getting severe COVID-19. But can your blood type also be a factor?

It's been more than five months since the coronavirus pandemic hit the United States. The social isolation is hitting some people hard, physically and mentally. In fact, one third of Americans are showing signs of clinical anxiety and depression. Learn how the power of music may help calm the stresses of COVID-19.