It will only hurt for a second.
This should make you run to get the flu shot, ASAP.
You can be contagious and start spreading the flu virus up to a day before symptoms appear.
Researchers have known the immune system plays a role in fighting the virus and other parts of the body do change. But a detailed account of what happens at the site of battle has been for the most part a mystery. Now an international team of researchers have given us a glimpse into the war happening inside.
Guy who doesn't wash his hands? We see you.
And the common cold!
It's that time of year again: flu season. Once again, the influenza virus has showed up in Canada threatening up to 20 per cent of the population. For the vaccine to be effective, it has to perfectly mimic the viruses in nature. This is actually harder than one might think as influenza is the master of evolutionary disguise.