https://www.sciencedaily.com/releases/2021/01/210107112430.htm

At the outset of the Covid-19 pandemic, little was known about the impact of population-wide governmental lockdowns. What was known was taken from restricted quarantines of small groups of people. "On the one hand, such drastic changes to daily routines can be detrimental to mental health," explains Professor Andrew Gloster from the University of Basel, co-leader of the study now published in PLOS One. "On the other hand, because the entire population was more or less equally affected during the lockdown, it remained unclear whether this impact would occur."

To address this question, Gloster and his international colleagues conducted an online survey in 18 languages. Almost 10,000 people from 78 countries participated, giving information about their mental health and overall situation during the Covid-19 lockdown.