Disgraced MP Eric Joyce apologised to his colleagues in the Labour Party as he tendered his resignation.
He told the House of Commons he "had a number of personal issues to address", adding that his behaviour in Strangers' Bar on February 22 had "fallen egregiously below what is required" by an MP.
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His warning came as officials projected 100,000 to 240,000 deaths in the US due to the coronavirus.
Three other people are confirmed to have died on the Zaandam, which has more than 200 Britons aboard.
NHS staff are frustrated as the Government fails to meet its target of 10,000 tests a day.