Hope Sanotize get approval soon. Looks to be very effective at reducing viral load in Covid infected patients and I imagine should also have an impact on reducing transmission:
www.biospace.com/article/releases/uk-clinical-trial-confirms-sanotize-s-breakthrough-treatment-for-covid-19/
I currently use Dual Defence when I go to to shops, which looks like it significantly reduces infection likelihood due to Carrageenan both trapping the virus and blocking replication : www.medrxiv.org/content/10.1101/2021.04.13.21255409v1
And the Swansea Uni ICE-COVID study on Carrageenen should be providing more results soon.