For seeing an overall mortality benefit in normal times, maybe. But it's the D-related-compound levels in your body right now (or seasonally) that have a notic

For seeing an overall mortality benefit in normal times, maybe. But it's the D-related-compound levels in your body right now (or seasonally) that have a noticeable effect on fighting current viral infections. It takes about 7 days for ingested Vitamin D to be fully converted into calcifediol, an important active form measured in the blood, and with good results as a treatment preventing ICU admission in serious COVID cases. So if you'd like a better chance of fighting off a COVID infection over the next few months with only mild effects, ensure you're on a daily regimen of Vitamin D now.