I have also seen strong warnings that the use of supplements (with the exception of vitamine D) for the purposes of warding off the virus has yet, not been supported by scientific evidence. Such evidence may have come, but I have not looked at anything recent.
I think that warning is considering the biological workings of the aviolar macrophages during the incubation process when the virus shows no symptoms. So far, the workings of vitamin D in this process have had good understanding. The aviolar macrophages release Interluken 1,6,8 TNF alpha and gamma interferon. The extent of this release is dependent on the genetic makeup of the individual and vitamin D levels. How this release occurs, if it is the dangerous pathway, can lead to hypoxema and hypocarbia causing dangerous consequences: ARDS leading to septic shock and finally multi-organ failure. The level of vitamin D will play an important role in this process.
Do make sure your vitamin D level is good (2,000 IU/day:
https://www.youtube.com/watch?v=cT1CaTv5-e4
As always use multivitamins for your general health.
I follow wellness protocols.
Zinc prevents RNA virus replication.
Why are you advising 2000 IU vit D3, if you are not my MD? Vit D3 usage depends on several factors plus the desired blood level.
Multivitamins are about useless for fighting a viral infection.
The WHO recommends 200,000 IU vit A for 2 days for measles. I wonder why.