Last Season’s Flu Vaccine Gets a C+ Overall, But Failed in Protecting Older Patients

Last Season’s Flu Vaccine Gets a C+ Overall, But Failed in Protecting Older Patients

The 2016–2017 flu season is far enough behind us that health system numbers crunchers can assess how well the vaccine performed—and it’s definitely a mixed bag. While it was a good match for the predominant strain (Type A H3N2) and was around 42% effective in preventing illness severe enough to send patients to the doctor’s office, the Centers for Disease Control and Prevention admits that it was essentially ineffective in protecting people age 65 and …

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