Vitamin D supplementation alone was not associated with all cause mortality in adults.  However, vitamin D supplementation reduced the risk of cancer death by 16%. Additional large clinical studies are needed to determine whether vitamin D3 supplementation is associated with lower all cause mortality.

The Coronavirus, 2019-nCoV seems to have a similar pathogenic potential as SARS-CoV and MERS- CoV. Consequently, a pregnant women may be at increased risk of severe infections. Since there are no specific early clinical signs of coronavirus exposure, it is therefore critical  to minimize chance of exposure.