Health expert Professor Tulio de Oliveira warns immuno-compromised people can produce new COVID-19 variants where the virus circulates and mutates within their bodies. Medical specialists uncovered potentially dangerous coronavirus mutations in a 36-year-old woman who has uncontrolled HIV. She was unable to shake the Covid-19 virus for close to eight months. Professor de Oliveira says this discovery will help not only COVID-19 patients but also HIV-positive people get more treatment.