Well here is something, already a month old, but high up in the google responses lol.
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https://www.medrxiv.org/content/10.1101/2021.03.16.21253767v1>
"The Elderly had a 95% lower death rate from December to March; however, and no change in the death rate in other age groups. The Hospitalization rate was reduced by 80% in this study cohort for people aged 80 or older, while people who were between 50 to 70 had almost the same hospitalization rate. "
Without digging deeper, that is all good news wrt "it works".