https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4829a1.htm https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4829a1.htm That kind of rates. In the 1918 influenza pandem

https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4829a1.htm https://www.cdc.gov/mmwr/preview/mmwrhtml/mm4829a1.htm That kind of rates. In the 1918 influenza pandemics for example, many people died of a bacterial pneumonia following the flu infection. So you see, the impact of "1-tier" infections is very real without antibiotics. EDIT: by all means, downvoters, make your point explicit!