, wtop.com
WASHINGTON – One thing is for certain when it comes to the flu: If you have it, someone gave it to you.
Area hospitals are . So much so, they’ve had to bring in additional staff.
While the flu outbreak is in focus, the illustrates just how easily the virus can spread – via people who may not even feel sick.
According to the CDC, most healthy adults can be contagious a full day before developing any flu-like symptoms.
In other words, a person can pass on the virus before he has even become sick.
For more information on how the flu can spread and how to keep protected, visit the .
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