Flu-like Illness. One of the earliest HIV symptoms in men is a severe 'flu-like' illness, known as the 'seroconversion illness.'. Seroconversion is the point in time where a person's blood is converted from being HIV negative to HIV positive, by the production of antibodies.
Erosion causes the surface of mountains to be younger than the rocks that form the mountains themselves. Glacial processes produce characteristic landforms, such as pyramidal peaks, knife-edge arÃªtes, and bowl-shaped cirques that can contain lakes.
Acute mountain sickness is caused by a lack of oxygen in the body of individuals exposed to higher elevations. This usually occurs when they travel to an altitude over 10,000 feet (3,000 metres) without proper acclimatisation before engaging in physical activities.