I'll trust the numbers, thank you.
As for your last paragraph, is there data available for Japan in the post-1987 (or, post-1994) years? There ought to be a lot of data available. That was 22 years ago.
Thanks for any information-producing links you can send along.
CA....
NEJM: Effectiveness of Influenza Vaccine in the Community-Dwelling Elderly
NEJM:The Japanese Experience with Vaccinating Schoolchildren against Influenza