Maintaining a high level of vitamin D, in the range of 38 nanograms per milliliter or more, can reduce the probability of contracting ailments including nasal congestion, sore throat, and common cold.
Lead Researcher Dr. James R. Sabetta suggests, “since vitamin D is generally acquired through exposure to sunlight, there is a higher probability that people living in sunnier climate often have higher rates of the compound in their body, thus making them less susceptible to the influenza virus.”
