Fewer births in states such as California may be delaying the annual onset of a common intestinal virus in the southwest, according to epidemiologists. The timing of infectious outbreaks in other locations such as the northeast remains more or less unchanged.
Rotavirus is a leading cause of diarrhea among children, both in the developed and developing world. In the United States, the virus causes about 60,000 hospitalizations each year and kills about 40 children below the age of five.