A contagious new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now dominant in the United States, CDC data show. What to know about symptoms and vaccines.

Altitude sickness is a serious condition for hikers. But what if it's not altitude sickness? This deadly condition with ...

A devastating hiking accident on Mount Whitney has left a 14-year-old California boy clinging to life after altitude-induced ...

A 14-year-old boy in the US is in a medically induced coma after walking off a 120-foot slope right in front of his father ...

The father of a teenager who walked off a 120-foot slope has spoken about the terrifying words he uttered shortly before the ...

A California teen is in a medically induced coma after walking off a 120-foot slope right in front of his terrified father ...

A high altitude rescue involving a Blackhawk helicopter occurred Wednesday morning at Snowmass Lake, after a 17-year-old was ...

As altitude increases, the air pressure and oxygen levels decrease, leading to hypoxia — a shortage of oxygen in the body’s tissues. Early symptoms of AMS include headache, nausea, fatigue ...

" Learning to recognise the early symptoms of altitude sickness, like severe headache, dizziness, and nausea, is vital to prevent serious complications. " ...

The symptoms of altitude sickness vary depending on the severity and how quickly an individual ascends. For AMS, the mildest form, symptoms usually appear within 24 hours of reaching a high altitude.

Altitude sickness emerged as a human concern thousands of years ago, and not just out of thin air. Even with years of studying the symptoms and impact on the body, it still affects many people who ...