Scientists at the U.S. Public Health Service's Communicable Disease Center in Montgomery, Alabama, had just discovered that the Brunhilde type of polio virus could be grown in mice. Shown, left to right, are: Mrs. Anna Hall, C.P. Li,...

Get the facts on the pinworm parasite. Everything from the history of discovery to public health strategies is available. A life cycle diagram provides a good overview of the problem of disease transmission.

Get the facts on the pinworm parasite. Everything from the history of discovery to public health strategies is available. A life cycle diagram provides a good overview of the problem of disease transmission.

Check out this extensive, but straightforward troubleshooting guide for computers.