1743. Impact of New York State (NYS) Influenza Mandate for Healthcare Workers (HCWs) on Influenza-like Illness (ILI)/ Acute Respiratory Illness (ARI) and Confirmed Influenza
Session: Oral Abstract Session: Influenza - Impact on Healthcare and Healthcare Providers
Saturday, October 29, 2016: 9:30 AM
Room: 388-390
Background:We evaluated the impact of a NYS Public Health law instituted in July 2013 mandating that all HCWs be vaccinated against influenza or wear a surgical mask in patient care areas during influenza season.

Methods:We performed a retrospective cohort study of HCWs at NewYork-Presbyterian (NYP) Hospital (6 acute care facilities and ~23,000 HCWs) presenting to Workforce Health & Safety (WH&S) with ILI/ARI over 3 influenza seasons: 2012-13 (pre-mandate), 2013-14 and 2014-15 (post-mandate). We determined the proportion of HCWs with influenza detected by reverse-transcriptase PCR (FilmArray, Biofire, Inc.) at WH&S or by testing performed by outside providers. We also determined influenza cases in vaccinated and unvaccinated HCWs. WH&S protocols for managing and testing ILI/ARI were unchanged during the study period.

Results:The overall influenza vaccination rate of HCWs at NYP was 86%, 92% and 92% in 2012-13, 2013-14 and 2014-15, respectively. Over the 3 seasons, the number of ILI/ARI episodes evaluated by WH&S decreased (Table), the proportion of ILI/ARI episodes tested varied (p<0.05), and the proportion of ILI/ARI in vaccinated HCWs increased (p<0.05). Influenza was detected in 49% of HCWs tested. The proportion of HCWs with laboratory-confirmed influenza varied over the 3 seasons (P<0.05), but the number of influenza cases decreased. The proportion of vaccinated influenza cases increased over the 3 seasons (p<0.05); overall, 72% had been vaccinated. The proportion of HCWs with influenza was lower among vaccinated (48%, 351/737) than unvaccinated (54%, 134/250) HCWs, but was not significant (p=0.1).






ILI/ARI episodes (n)





ILI/ARI with viral testing performed (n, %)

468 (82%)

306 (90%)

213 (74%)

987 (83%)

ILI/ARI in vaccinated HCWs (n, %)

388 (68%)

295 (87%)

264 (92%)

947 (79%)

HCWs influenza positive (n, %)

227 (49%)

169 (55%)

89 (42%)

485 (49%)

Influenza positive and vaccinated (n, %)

126 (56%)

140 (83%)

85 (96%)

351 (72%)

Conclusion: In associated with the NYS mandate, the proportion of vaccinated HCWs increased and the number of ILI/ARI visits and influenza cases decreased. These findings suggest a beneficial impact of the NYS mandate and should be evaluated across more seasons and in other centers.

Lisa Saiman, MD, MPH, FSHEA1,2, Rachael Batabyal, MD2, Juyan Julia Zhou, MS, MPH3, Luis Alba, BS3, Claire Brown, MD2, E. Yoko Furuya, MD, MS2,4,5, Melissa Stockwell, MD, MPH3, David P. Calfee, MD, MS, FIDSA, FSHEA6, Helen Lee, MD, MPH2,3,6, Aziza Craan, AAS2 and Joy Howell, MD2, (1)Pediatrics, Columbia University Medical Center, New York, NY, (2)NewYork-Presbyterian Hospital, New York, NY, (3)Columbia University Medical Center, New York, NY, (4)Medicine, Columbia University Medical Center, New York, NY, (5)Infection Prevention & Control, New York Presbyterian Hosp. (NYPH), New York, NY, (6)Weill Cornell Medicine, New York, NY


L. Saiman, None

R. Batabyal, None

J. J. Zhou, None

L. Alba, None

C. Brown, None

E. Y. Furuya, None

M. Stockwell, Pfizer Medical Education Group: Grant Investigator , co-investigator but receives no financial support for an unrelated, investigator-initiated grant

D. P. Calfee, None

H. Lee, None

A. Craan, None

J. Howell, None

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