During a severe flu outbreak including the new H1N1 flu, many people could be sick at the same time. There also may be more hospital stays and deaths than during a regular flu season. Some of us may become anxious about whether we have this new illness and whether we need medical help. Find out the warning signs of the flu. Comments on this video are allowed in accordance with our comment policy: http://www.cdc.gov/SocialMedia/Tools/CommentPolicy.html This video can also be viewed at http://www.cdc.gov/cdctv/