Did you get your flu shot yet? Most of the clinics up to the end of October were reserved for people in high risk groups. Now, anyone can supposedly get one. Of course, you have to find them. Here are two places to start:
First, Sutter Health has a search feature for clinics they are doing in the bay area for the next three months. The costs for the shot range between $10 and $30 with most being $25. You can volunteer at a Sutter Health clinic and, in return, receive a free shot so if the cost is an issue that would be worth checking out further.