If I may ...
Do you like that he says this crap will return in September? How does he know that, or how can he say that? Just questioning.
It happens every year. Between fall and spring. Without fail. When the axis of our latitude changes relative to the sun, it gets colder, (aka, seasonal change), people stay inside, diets change, UVB rays cannot get through the atmosphere that allows people's skin to produce Vitamin D which is a major component of keeping a healthy immune system. In the winter, eat natural foods that supply Vitamin D, and other vital phytonutrients to keep healthy.
It is now clear that vitamin D has important roles in addition to its classic effects on calcium and bone homeostasis. As the vitamin D receptor is expressed on immune cells (B cells, T cells and antigen presenting cells) and these immunologic cells are ...
www.ncbi.nlm.nih.gov
*Added ... Part of the above link.
"There have been multiple cross-sectional studies associating lower levels of vitamin D with increased infection. One report studied almost 19,000 subjects between 1988 and 1994. Individuals with lower vitamin D levels (<30 ng/ml) were more likely to self-report a recent
upper respiratory tract infection than those with sufficient levels, even after adjusting for variables including season, age, gender, body mass and race[
8]. Vitamin D levels fluctuate over the year. Although rates of seasonal infections varied, and were lowest in the summer and highest in the winter, the association of lower serum vitamin D levels and infection held during each season."