China has announced a 14% jump in the number of its citizens who are living with HIV and Aids. More than 820,000 people are affected in the country, health officials say. About 40,000 new cases were reported in the second quarter of 2018 alone. The vast majority of new cases were transmitted through sex, marking a change from the past. Traditionally, HIV spread rapidly through some parts of China as a result of infected blood transfusions.