Oxford study in the UK reached the same conclusion.
Have you read the Oxford study?
I have, and suggest you might be interested.
https://www.medrxiv.org/content/10.1101/2020.03.24.20042291v1You will need to have a Dropbox account.
Edit: I see kingston already pointed out that the article is not peer reviewed ... nor is it finding much acceptance in the scientific community.