There can be at least 3 possibilities to say about deaths caused by any virus/pandemic, for example covid-19.
- N number of people lost lives during covid-19 pandemic.
- N number of people lost lives in the covid-19 pandemic.
- N number of people lost lives due to the covid-19 pandemic.
1st seems okay to me. Is it?
2nd I'm afraid can mean that the deaths were not merely caused by covid-19. There can be multiple reasons. Is it? Or people can understand it that it means deaths by covid-19 only?
3rd also seems okay, but is it better to use than 1st?