Doctor Marta Gravellone, prepares for a home visit, as the spread of coronavirus disease (COVID-19) continues in Oleggio, Italy, April 23, 2020. REUTERS/Flavio Lo Scalzo

ARONA, Italy: Marta Gravellone, a young doctor making house calls on coronavirus patients, knew what it was like to be ill and isolated long before the pandemic hit her home in northern Italy.