If a persons COVID-19 symptoms return, and it is 28 days or less since their last COVID-19 infection, then there is no need to take a RAT and they should stay home and recover until they have been 24 hours symptom free. If a person develops new COVID-19 symptoms and it is 29 days or more since their last COVID-19 infection it is possible they may have Covid-19 again, and they should take a RAT. If the test is positive, this will be considered a reinfection and they should begin their 7 day isolation period. Household contacts no longer need to isolate.