Luca Di Nicola, 19, worked as a chef at a family restaurant in Enfield, North London, before contracting Covid-19.
Originally from east Italy, Luca, died at the North Middlesex Hospital in London.
His family described him as "very healthy", although he did visit a GP with coronavirus symptoms before he died.
Speaking to Italian news outlet La Repubblica, Luca's auntie said: "For a week before his death Luca had a fever and a cough and my sister-in-law Clarissa and her partner Vincenzo who lived in the same house also had it.
"The London-based doctor gave my nephew some paracetamol.
"But Luca got worse on March 23.
"The doctor visited him at home and told him that he was young, strong and that he didn't have to worry about that bad flu."
However, Luca's condition worsened when he collapsed after complaining of chest pains.
Family members called an ambulance, and paramedics managed to revive him, but his lungs collapsed.
There are now fears that Luca's mum Clarissa and Vincenzo may have the disease after showing similar symptoms.
They have been told to self-isolate for two weeks.
Italy continues to be Europe's worst affected country for coronavirus, with almost 11,000 deaths.
The country has recorded more than 92,000 cases of Covid-19, with 919 dying in a single day on Friday, Italy's largest daily toll. // <\/s'+'cript>'); // --> //]]> From ICE
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