2017–2018 United States flu season
According to the US Centers for Disease Control and Prevention (CDC), there are no reports of childhood flu deaths nationwide. To monitor influenza-related deaths of all ages, the CDC tracks deaths caused by pneumonia and influenza (P&I) through the National Center for Health Statistics (NCHS) mortality reporting system. The system tracks the proportion of death certificates that list pneumonia or influenza as a potential cause of death. The system provides an overall indication of whether influenza-related mortality has increased, but does not provide an exact number to indicate the number of deaths from influenza. During the 2017-2018 season, the percentage of deaths due to pneumonia and influenza (P&I) reached or exceeded the epidemic threshold for 16 consecutive weeks.