Everybody in the world doesn't own a smartwatch, but this interesting article confirms the estimation of the NoCoRoNa group that about 75 % reduction of talking indoors during the Covid-19 pandemic would have eliminated the pandemic even without the need of investments in smartwatches.
A combination of our preventive method with the presymptomatic smartwatch method would, however,  eliminate a pandemic faster in case persons, who despite the recommendations to talk less indoors get infected, distance themselves socially after being diagnosed as infected with help of the smartwatch.
REFERENCES
1. Editorials. Covid -19 has redefined airborne transmission. BMJ 2021;373:n913 doi:https://doi.org/10.1136/bmj.n913
Rapid responce:
van Assendelft AH, Kovanen PT,  Jantunen M,  Rosendahl H, Kosonen, R,  Kurnitzky J, Groop P-H. Minimizing talking  indoors as a strategy for eliminating the Covid-19 pandemic.
2. Dowell D, Lindsey WG, Brooks JT. Reducing SARS-CoV-2 in Shared Indoor Air. JAMA, 2022;328(2):141-142. doi:10.1001/jama.2022.9970
Rapid responce:
van Assendelft A. Reducing SARS-CoV-2 Aerosol Transmission through Minimizing Talking Indoors.