World Rugby is considering scrapping reset scrums and banning upright tackles as it seeks to limit the potential for players to spread the coronavirus.
A study by the game's governing body found that up to 50% of "high-transmission risk exposure time", based on WHO guidelines of being within one metre for 15 minutes, comes at scrum-time.
Scrapping reset scrums, which are also a common source of wasted time on field, would reduce that exposure time for front rows and locks by almost 30%.
Exposure time for front-rows and locks is an average of 13.4 minutes per 80-minute match, with reset scrums accounting for 3.6 minutes of that time.
World Rugby's Law Review Group will consider alternatives to resets with a free-kick appearing the most likely.
The report added that banning upright tackles, which have already been clamped down on in recent years, would "decrease the frequency of high-risk exposure events by 20%".
Other recommendations, which will be considered by World Rugby's executive committee this week, include a ban on spitting, teams washing hands pre-match and changing gear at half-time, and match balls being sprayed with disinfectant mid-game.
The high level of physical contact between players compared to other sports is a key issue for rugby as it considers a return to play during the pandemic.
The IRFU hopes that the Irish provinces can return to action by the end of August but players are not expected to resume group training until June.