“…Histopathological studies in deceased and severe human influenza cases during a pandemic outbreak14, 15, 16 attribute a substantial fraction of influenza deaths to secondary pneumococcal infection. The strength of the interaction between influenza or influenza‐like illness (ILI) and IPD at population level, however, varies across studies from non‐existent to significant 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27. Studies looking at specific respiratory viruses also showed inconsistent results 5, 28, 29, 30.…”