the transmission risks. a group of researchers performed an experiment at numerous college universities, testing to examine what the post quarantine transmission risk was. from harvard university, duke university, boston university, and northeastern university, the post quarantine transmission risk after 7 days, was 13%. however, the difficulty with this is that some individuals may remain communicable as short as 4 days or as long as 14 days. another leading factor to the post quarantine transmission risks that researchers discovered, was that the different variants of covid, had different levels of contractibility. after comparing the transmission risks from individuals with different strains, the omicron strain was found to be the most communicable on day 5, but begins to balance out with the other strains in days 5-10. having differing rates of infectivity for each variant can play a role in the amount of time an individual should quarantine. this is one of the many factors affecting the post quarantine transmission risks, and more research should be done before coming to a set conclusive quarantine time. psychological impact