Generalized Muscle Weakness - Videos

A company in Meriden, Connecticut is producing doses of a swine flu vaccines but does not hava a customer yet.

Janet Shamilan reports on some of the people who have come down with swine flu.

Meredith Viera speaks with Dr. Richard Besser, Acting Director of the Centers for Disease Control and Prevention re: swine flu.

The World Health Organization has raised the swine flu pandemic threat level to 4 on a scale of 1 to 6. NBC's Robert Bazell reports.

NBC's Ann Curry and Nancy Snyderman discuss the swine flu, its symptoms, and ways to treat it.