Last I heard, it was the urine.
https://www.dailymail.co.uk/news/article-8112169/Hundreds-Hindus-hold-cow-urine-drinking-party-belief-fight-coronavirus.html
Hmm, so home remedies for the Wuhan Virus:
China - garlic water
India - cow urine
Iran - Imam spit and licking walls
USA - pallets of TP