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Here’s another trial proving the efficacy of upper respiratory tract hygiene, this time using silver nanoparticles (AKA colloidal silver) for gargling and nose rinse:
Evaluation of silver nanoparticles for the prevention of SARS-CoV-2 infection in health workers: in vitro and in vivo (preprint). Almanza-Reyes et al. 2021.
We present a prospective randomized study of 231 participants that was carried out for 9 weeks (during the declaration of a pandemic). The “experimental” group was instructed to do mouthwash and nose rinse with the AgNPs solution; the “control” group was instructed to do mouthwashes and nose rinse in a conventional way. The incidence of SARS-CoV-2 infection was significantly lower in the “experimental” group (two participants of 114, 1.8%) compared to the “control” group (thirty-three participants of 117, 28.2%), with a 84.8% efficiency.
The number of adverse events reported was 0 (zero).
And now for the propaganda agencies (AKA Fact-checkers):
Colloidal silver has not been shown effective against new virus from China
Social media users have most recently linked it to products to address the new virus that emerged from China. But experts have long said that the solution has no known function or health benefits and it comes with serious side effects. The FDA has taken action against companies promoting colloidal silver products with misleading claims.
“There are no complementary products, such as colloidal silver or herbal remedies, that have been proven effective in preventing or treating this disease (COVID-19), and colloidal silver can have serious side effects,” Dr. Helene Langevin, National Center for Complementary and Integrative Health director, said in a statement.
The NCCIH says colloidal silver has the power to turn skin blue when silver builds up in the body’s tissue.