Tldr; it might help to take zinc.
Out of 249 studied patients, there was 8% (21 patients) mortality. The investigators found a significantly lower plasma level of zinc in COVID-19 patients who died (43 μg/dl) than the patients who survived (63.1 μg/dl). After adjusting different variables, the investigators showed each unit increase of plasma zinc at the time of hospital admission resulted in a 7% reduced risk of in-hospital mortality.
Big maybe, since this is a correlation. Supplementation could have no effect. It is also pales in comparison to the effect of vaccinations.
Now, mineral prices will go up.
Zinc deficiency increases the risk for all sorts of infections, as the article states, including COVID-19. But this is nothing new: keeping a healthy, balanced diet and getting enough of all nutrients is important for everything in health.