Area plots of centered and scaled excess all-cause mortality for all age groups for all data available for the second half of the 20th century. Data are for (A) Australia, (B) Canada, (C) France, (D) Japan, (E) the UK, and (F) the US. Values for the oldest age group are outlined by a black dashed line and filled in purple. Color breakthroughs demarcate seasons of immunoprotection of the old elderly sub-population.
Reichert et al. BMC Medicine 2012 10:162 doi:10.1186/1741-7015-10-162