People with confirmed COVID-19 who are not showing any symptoms of the disease are as contagious as those with symptoms.<br />According to.a new study, asymptomatic COVID-19 patients can test positive for the virus for up to 18 days after diagnosis.<br />In samples collected from patients, the virus declined more slowly in those without symptoms than in those with symptoms.<br />Many asymptomatic patients also had evidence of "viral shedding", meaning they were contagious for at least 30 days after diagnosis.
