Half of all people living in Nairobi are aged between 15 and 34 and this is the age most new infections happen.
The National Syndemic Diseases Control Council, which released the new HIV Situation in Kenya data, said about 16,752 Kenyans were newly diagnosed with HIV in 2023.
According to the National Syndemic Diseases Control Council, at least 51 per cent of new HIV infections occur in nine counties.
These counties are Nairobi, Kisumu, Nakuru, Migori, Homa Bay, Uasin Gishu (home of Eldoret city), Siaya, Mombasa, Kakamega, Kericho and Kajiado.
There is a greater focus on new infections (also known as incidence) nowadays because the trend reveals who is at the greatest risk of infection.