Causes of conjunctivitis. Causes of conjunctivitis include: Bacterial or viral infection. Infection with a virus that may also cause a fever and sore throat. Sexually transmitted infections (STIs), including chlamydia and gonorrhoea. Irritants such as chlorine from swimming pools, shampoo, smoke, fumes or a loose eyelash.
India is on track to become the worldâs most populous nation in less than a decade â or six years earlier than previously thought, according to the U.N. With 1.38 billion people compared with Indiaâs 1.31 billion, China is currently the worldâs most populous country. Figures for both countries are expected to swell to around 1.4 billion by 2022, at which point Indiaâs population is likely to expand beyond Chinaâs.
However, by 2050, China is projected to have surpassed the U.S. with a larger proportion of its population 65 and older (26.8 percent versus 20.9 percent). Although a larger proportion of the U.S. population is currently in the older ages, China and India have much larger populations overall, including 65 and over. In 2012, China had 122 million and India had 67 million people 65 and over, compared with 43 million in the United States.