Last week, the FTC sent another 50 warning letters related to COVID-19 advertising claims, adding to the growing list of FTC warnings and actions intended to address false and deceptive marketing during the pandemic. The latest round of letters targets companies advertising their products and services as effective in preventing or treating COVID-19 without adequate scientific support, including acupuncture, intravenous (IV) therapies, ozone therapy, stem cell treatments, sound frequencies, air-purifiers, and immune-defense supplements.…