A nurse administers a flu shot at Perry Memorial Hospital in Princeton, Illinois, on Oct. 12, 2017. MUST CREDIT: Daniel Acker/Bloomberg
A nurse administers a flu shot at Perry Memorial Hospital in Princeton, Illinois, on Oct. 12, 2017. MUST CREDIT: Daniel Acker/Bloomberg Daniel Acker Bloomberg
A nurse administers a flu shot at Perry Memorial Hospital in Princeton, Illinois, on Oct. 12, 2017. MUST CREDIT: Daniel Acker/Bloomberg Daniel Acker Bloomberg