A Repeated Cross-Sectional Study published by the journal Annals of Internal Medicine on December 28, 2021, found about 28% of reproductive-aged women hospitalized with influenza were pregnant over nine flu seasons.
Of 9,652 women hospitalized with influenza, 27.9% were pregnant.
Among the 2,690 pregnant women, the median age was 28 years, 62% were in their third trimester, and 42% had at least one underlying condition.
Overall, 32% were vaccinated against influenza.
Five percent of these women required ICU admission, 2% required mechanical ventilation, and 0.3% (n = 8) died.
Furthermore, pregnant women with influenza A H1N1 were more likely to have severe outcomes than those with influenza A H3N2 (adjusted risk ratio, 1.9 [95% CI, 1.3 to 2.8]).
Among 754 women who were no longer pregnant at discharge, 96% had a pregnancy resulting in a live birth, and 3% experienced fetal loss.
These researchers stated, ‘Pregnant women remain a high-priority group for influenza vaccination.’
As of December 18, 2021, the seasonal influenza activity in the U.S. was increasing, including indicators that track hospitalizations.
The majority of influenza viruses detected are A(H3N2).
Most influenza A(H3N2) infections have occurred among children and young adults.
‘The 2021-2022 flu season is just getting started,’ stated the U.S. Centers for Disease Control and Prevention (CDC).
‘There’s still time to get vaccinated.’
‘An annual flu vaccine is the best way to protect against flu and its potentially serious complications.’
Various authorized flu shots are listed on this webpage.
The Primary Funding Source of this research was the CDC. No researcher disclosed industry conflicts of interest.