I debunked this already:
https://academic.oup.com/aje/article/162/5/479/82647
During an outbreak of a novel or emerging infectious agent such as SARS, one of the most important epidemiologic quantities to be determined is the case fatality ratio—the proportion of cases who eventually die from the disease. This ratio is often estimated by using aggregate numbers of cases and deaths at a single time point, such as those compiled daily by the World Health Organization during the course of the SARS epidemic (5). However, simple estimates of the case fatality ratio obtained from these reports can be misleading if, at the time of analysis,
the outcome is unknown for a nonnegligible proportion of patients. The estimates obtained during the SARS epidemic by dividing the number of deaths by the total number of reported cases were much lower (3–5 percent during the first few weeks of the global outbreak) than those obtained when appropriate statistical techniques were used and varied significantly between countries (6–8).
Furthermore, as the epidemic progressed, these statistically naïve estimates falsely suggested a rise in the case fatality ratio (9), fueling the already high levels of public alarm in the affected populations.
exact same estimates can be found for H1N1, a mild flu
https://www.webmd.com/cold-and-flu/news/20091103/h1n1-swine-flu-deadly-in-all-age-groups#1
The pandemic
flu bug is far more likely to strike younger people. But when people aged 50 and older get hospitalized with H1N1 swine flu, their case-fatality rate is the highest of any group: 18% to 20%.
it's fuzzy math based on presumptions. A colorful chart makes 0 difference.