Предыдущие исследования в других странах показывали подобную эффективность мер- 58% для Ухани, Китай, 42-49:% для Италии и 76-78% для Франции.
Reducing contact rates—mainly via school closures and voluntary or mandated stay-at-home measures—contributed to around a 70 percent reduction in the transmission of COVID-19 in New York City during the spring pandemic wave from March to the June reopening. Widespread use of face coverings contributed an additional 7 percent reduction, and up to 20 percent reduction among those aged 65 and older during the first month face covering was mandated in public places.
The New York City study finds reducing contact rates was highly effective for most age groups—contributing to at least a 50 percent reduction in transmission across age groups, ranging from a 51 percent reduction among 1-4 year-olds to 83 percent among 5-14 year-olds.
“Improving effective use of face coverings, especially among younger people, would significantly mitigate the risk of a resurgence in COVID-19 infections during re-opening,” says senior author Jeffrey Shaman, PhD, professor of environmental health sciences at Columbia Mailman School. “It’s crucial that we find ways to boost consistent and correct mask use in settings where social distancing is not possible.”
“Overall, our study supports the need for multiple interventions, including restricting occupancy to reduce contact rates, universal face covering, testing and contact tracing, and isolation and timing treatment of active infections,” says lead author Wan Yang, PhD, assistant professor of epidemiology at Columbia Mailman School. “We need to implement all of those simultaneously in order to effectively mitigate the spread of COVID-19.”
The new study is in line with previous modeling studies estimating that lockdowns reduced COVID-19 transmission by 58 percent in Wuhan, China, 45 percent in Italy, and 77 in France.