Volume 29, Number 12—December 2023
Research Letter
Influenza Resurgence after Relaxation of Public Health and Social Measures, Hong Kong, 2023
Weijia Xiong, Benjamin J. Cowling, and Tim K. Tsang
Table
Effects of public health and social measures to protect against COVID-19 on Rt for influenza, Hong Kong, 2010–2023*
| Model† | PHSM description | % Change in Rt (95% CI) | ΔAIC‡ |
|---|---|---|---|
| Model 1 | 3.62 |
||
| Mask | −25 (−43 to −1) | ||
| Preventive score 1 |
Avoid social gatherings. Wash hands after being outside. Avoid touching or use protective measures with shared objects. |
−82 (−91 to −63) |
|
| Model 2 | 9.55 |
||
| Mask | −26 (−44 to −2) | ||
| Preventive score 2 |
Avoid going out as much as possible. Wash hands after being outside. Avoid touching or use protective measures with shared objects. |
−80 (−91 to −55) |
|
| Model 3 (main model) | 0 |
||
| Mask | −25 (−43 to −1) | ||
| Preventive score 3 |
Avoid going to crowded places. Avoid going to healthcare facilities. Avoid touching or use protective measures with shared objects. |
−77 (−88 to −60) |
|
| Model 4 | |||
| Mask | −24 (−43 to 0) | ||
| Preventive score 4 | Avoid going to crowded places. Avoid going to healthcare facilities. Avoid touching or use protective measures with shared objects. Wash hands after being outside. | −81 (−90 to −62) | 2.79 |
*AIC, Akaike information criterion; Rt, time-varying effective reproductive number. †Models were adjusted for depletion of susceptible persons, between-season effects, and absolute humidity. ‡ΔAICmodeli = AICmodeli − AICmin,AICmin = min(AICmodeli), i = 1,…,4.
Page created: October 20, 2023
Page updated: November 18, 2023
Page reviewed: November 18, 2023
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.