At worst, in people with compromised immune systems like infants, the elderly, and people with AIDS, it may be fatal. Flu vaccines may offer some protection but not for all of us. When a new strain of flu develops, it takes time to identify it and then produce a vaccine. Meanwhile people may suffer with it and possibly die from it. Another problem is that a flu vaccine is made for only one specific strain, so if another strain develops, you will not be protected from that new strain.
People often go to their doctors for a prescription for antibiotics when they get a cold or the flu.
But antibiotics don't work for these illnesses. That's because colds and flu are not caused by bacteria. They are caused by viruses. The truth is, western medicine never had an effective treatment for colds and flus until just a few years ago when antiviral medications became available on the market. But these medications can have side effects and they are not safe for children under the age of 7.