In a recent study of hospitalizations for influenza A versus B, the odds of mortality were significantly greater with influenza B than with A and were not entirely explained by underlying health conditions.30.
Special effort should be made to vaccinate individuals in the following groups: found that more than half of pediatric deaths from 2010 through 2014 had ≥1 underlying medical condition with an increased risk of severe influenza-related complications; notably, only 1 in 3 of these at-risk children had been vaccinated.
The 2017–2018 influenza A (H1N1) vaccine strain differs from that contained in the 2016–2017 seasonal vaccines.
The 2017–2018 influenza A (H3N2) vaccine strain and influenza B vaccine strains included in the trivalent and quadrivalent vaccines are the same as those contained in the 2016–2017 seasonal vaccines: a.
Obesity was assigned if indicated in the patient’s medical chart or if the BMI was 30.
The category “no known condition” indicates that the patient did not have any known underlying medical condition indicated in the medical chart at the time of hospitalization.