Boys also suffer higher even rare disorders such as ADHD and autism. A comprehensive study of South Korean schoolchildren published earlier this year estimated 3.74 percent of all boys in this country have some form of autism, as compared to 1.74 percent of the girls.
A 1992 Danish analysis of sperm from other studies concluded that sperm quality has been falling for decades, and a 1997 re-analysis of different mathematical modeling confirmed the decline, the estimate of a decline in sperm level of about 1.5 percent per year in the United States.Seasonal flu All Videoinfluenza is a highly infectious virus easily from man to man, particularly when an infected person coughs or sneezes. According to the World Health Organization , 5-15 percent of the population will concerned with a the upper respiratory tract infections in year influenza epidemics. Hospitalizations and deaths mainly get into high-risk groups . Though difficult to judge, See will be thought to have lead into three to five million instances of of severe illness and 300,000 to 500,000 deaths each year in the world . Most deaths current associated with influenza appear in the industrial.