When the world shut down due to the COVID-19 pandemic in early 2020, another crisis quietly grew behind closed doors. Reports from around the globe suggested that violence against women and girls was increasing. Governments, nongovernmental organizations and advocates began referring to the phenomenon as a “shadow pandemic.”

To determine whether these headlines and informal reports reflected reality, we led the first-ever comprehensive review of studies tracking violence against women and girls during infectious disease outbreaks across low- and middle-income countries. We focused on those regions because less research on the topic has been done there, and women and girls face specific risks, such as child marriage, that are less prevalent in wealthier nations.

Our findings, published in BMJ Global Health and co-authored with UNICEF, are both clear and concerning: Violence against women and girls tends to increase during outbreaks, and the very measures used to control disease spread can lead to that rise.

Across 53 studies measuring changes in violence against women and girls in the first year of the COVID-19 pandemic, the majority found increases, with some studies showing no change and relatively few showing declines. This pattern held across different types of violence – for........

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