Why do I have the flu (causes)?

Causes
Flu viruses travel through the air in droplets when someone with the infection coughs, sneezes or talks. You can inhale the droplets directly, or you can pick up the germs from an object, such as a telephone or computer keyboard, and then transfer them to your eyes, nose or mouth.

The flu is caused by three types (strains) of viruses 鈥?influenza A, B and C. Type A is responsible for the deadly influenza pandemics (worldwide epidemics) that strike every 10 to 40 years. Type B can lead to smaller, more localized outbreaks. And either types A or B can cause the flu that circulates almost every winter. Type C has never been connected with a large epidemic.

Type C is a fairly stable virus, but types A and B are constantly changing, with new strains appearing regularly. Once you've had the flu, you develop antibodies to the virus that caused it, but those antibodies won't protect you from new strains. That's why doctors recommend getting a flu shot every year.

catch it from other people, like touching doorknobs when leaving public restrooms. People shaking your hand,etc.

The agent that causes influenza was spread to you.

You caught the germs from someone else, just like a cold.
You can't cause it by yourself.

a flu is a viral infection its mode of transmission is through droplets.this flu viruses travel through the air in droplets when someone with the infection .coughs, sneezes or talks. You can inhale the droplets directly, or you can pick up the germs from an object, such as a telephone or computer keyboard, and then transfer them to your eyes, nose or mouth. anyone could get a flu especially those who have a weaked immune system and has chronic illneses.