That's because he was on the verge of dying from Covid and as a last resort he was given HCQ and very quickly got better. I wrote about his case in the famous with covid thread (
https://dr1.com/forums/threads/famous-well-known-dominicans-with-covid.261943/). He along with several others were given the treatment and since mortality from that is and continue to be zero, the Dominican government ordered enough of that medicine and gives it for free to doctors and hospitals with critical Covid patients. Recuperating figures has been rising since then, now surpassing total deaths. The DR until recently was one of the few countries where deaths surpassed recuperated numbers, which show the quality of the medical facilities and care. If it wasn't for the HCQ treatment, it would most likely continue to be a death sentence for anyone requiring hospitalization due to Covid in the DR.
You should always keep in mind that in the USA the drug is politicized because Trump praised it on a news conference. Many people are against that treatment due to that, which is proof that he should've remained quiet about it. So far there are no death in severe Covid patients that have been given the HCQ treatment in the DR.