A new study is giving more support to current guidelines for what people in the United States should do if they test positive for COVID-19.Researchers at the Boston University School of Medicine looked at college students who are vaccinated against COVID-19 and came down with the coronavirus, including during the surge of the delta and omicron variants.Those BU researchers found that most young, healthy, vaccinated adults had a very limited period of being infectious. Only 17% of students in the study remained COVID-19 positive beyond five days.Dr. John H. Connor, an associate professor of microbiology at the BU School of Medicine, said these findings are a testament to how far the U.S. has come over the past two years.”We have developed a lot more and a lot better tools to deal with the disease caused by SARS-CoV-2, and that is really encouraging,” Connor said. “That is what, I think, allows a greater sense of freedom.”Current guidance from the U.S. Centers for Disease Control and Prevention (CDC) calls for people who test positive for COVID-19 to isolate for five days and then wear a mask for an additional five days.Connor said BU’s research is further proof that the CDC’s approach is the correct one to protect as many people as possible form COVID-19.