Looks like pretty good odds for the high does for us over 65 y/o:
"How effective is the flu vaccine in the elderly?
In numerous studies since 2010, flu vaccines have helped protect adults 65 years of age and older against influenza A(H1N1) viruses and both lineages of influenza B viruses. Specifically, flu vaccines have reduced the risk of medically attended illness caused by H1N1 or B by more than 60% on average among people age65 and older (1). Flu vaccines also have reduced the risk of flu hospitalization among adults age 65 and older by 54% against A(H1N1) viruses and by 31% against influenza B viruses on average (2).
However, protection against influenza A(H3N2) flu viruses has been less consistent. On average, flu vaccines have reduced the risk of doctor visits with A(H3N2) flu by 24% and reduced the risk of hospitalization with A(H3N2) flu by 33% in adults age 65 and older (1,2). During seasons when the H3N2 vaccine component has been like (well-matched to) the flu viruses circulating in the community, the benefit from flu vaccination has been higher. During these seasons, flu vaccine reduced the risk of hospitalizations with A(H3N2) flu by 43% on average (2). But when the vaccine component was less similar to viruses in the community, the protection has dropped to 14% (2)."
The complete article from the CDC: [
www.cdc.gov]