I posted this earlier in the week, but did anons did not take notice so I will try again. For anons seriously concerned about coronavirus, I highly recommend taking Red Marine Algae (contains sulfated polysachharides and polyphenols). In numerous studies, it has been shown to be effective against treating HIV, Herpes Simplex, Influenza and skin conditions like eczema. Personally I take a small amount each day to prevent illness (I work in public service, deal with lots of people/hand shaking every day) and treat the occasional rare illness. 10+ years ago I used it to get over Mono in 4 days. My doctor was blown away by results confirmed by a blood test. Currently using it to treat random bout of stress induced hives (this is after prednisone failed, red marine algae working). It's a natural immune booster.

Some scientists believe that there is a smaller prevalence of AIDS/HIV in countries like Japan and Korea (less than 1 in 10,000) compared to countries like Africa (every 1 in 10) due to regular consumption of spirulina in diet. (https://clinicaltrials.gov/ct2/show/NCT01195077)

From a study in 2015:

"This review presents an analysis of works devoted to the anti-human immunodeficiency virus (HIV) activity of algae metabolites—sulfated polysaccharides (fucoidans, carrageenans), lectins, laminarans, and polyphenols. Despite the presence of a significant number of antiretroviral drugs, the development of new therapeutic and prophylactic agents against this infection remains very urgent problem.

The results of experimental and clinical studies conducted in vitro and in vivo are presented, and the issues of the anti-HIV activity of these compounds are considered depending on their structural features.

On the whole, the presented data prove the high efficiency of seaweed metabolites and justify the possibility of their use as a potential basis for the development of new drugs with a wide spectrum of activity."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6572556/