Surprise! An institute named after a megadose vitamin-C whackadoodle is pushing the idea that large doses vitamin C reduces illness duration. I'm shocked.
Please spare us from reports of studies with few subjects (n < 50), based on subjective self-report, and with results reported that were unintended by the study's design.
It's just p-hacking or random chance and a news outlet's way of generating clicks for itself. These findings are made public, and then almost always quietly disappear into the churn of other scientific ideas of dubious validity.
If only the follow-up, larger (n >> 50) study that later is conducted that reports negative results was as widely reported and disseminated.
I mean, it's possible, but what a junk study.