There's been other posters here who have confirmed my statement that flu vaccines won't achieve herd immunity.Even when you use the right facts, you draw wrong conclusions.
Nope, but the cost/benefit ratio is higher for those with more exposure to the flu, and who have greater effects if they get sick with it.Flu shots don't know who's old and who's health care worker.
It can be as little as 10 percent depending on the flu season. Flu is just not a great vaccine candidate. I'm not sure why your girlfriend isn't teaching you the correct stuff about herd immunity.20% protection rate is simply not true. You pulled that out of you ass, or link please! If that was the case, then it would have been the money burned.
Herd immunity requires around 75 percent of the population to be inoculated. Some diseases like Measles require more, around 87 percent to effectively shield everyone.Herd immunity is achieved both by effectiveness and by % of population reached.