As a public health nurse, I have given thousands of vaccines to adults as well as children. Very few have any reaction to the vaccines. Most reactions are very mild and can be taken care of by ice to the area. Most nurses who give "shots" are well trained and know how and where to vaccinate you to cause minimal pain and discomfort.
I get my flu shot yearly and am amazed at the number of people who say that they get the flu from the flu shot. The flu vaccine is dead. The inhaled vaccine is live.
The military has used the air shots for a real long time. This is not new technology. I know I will hear from all sorts of people who will contradict what I said about the dead vaccine, but the facts are the facts.
We quilters need to stay healthy so we can keep on quilting!