Australia will not allow the use of saliva or sweat to shine the ball once cricket training resumes in the post COVID-19 world, says a framework released by the federal government regarding the staged return of sports amid the pandemic. There is speculation that use of saliva to shine the ball will be stopped to cut down the risk of the highly contagious infection.

from Times of India https://timesofindia.indiatimes.com/sports/cricket/news/australia-restricts-use-of-saliva-sweat-to-shine-ball-under-covid-19-guidelines/articleshow/75490139.cms