The deceased were identified as Asaduzzaman, 24, of Lobonchera area in the city and Mitu, 10, of Kajdia village in Rupsha upazila.
KMCH physician Shoilendranath Biswas said Asaduzzaman died at the isolation ward at 10am while the Mitu died at 12:30pm with breathing complications.
Asaduzzaman was admitted to hospital at 9am with breathing complications and died shortly after shifting to the isolation unit of the hospital, he added.
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Meanwhile, the girl also was admitted to KMCH on Thursday night and later she was taken to the isolation unit where she died Friday noon, Dr Shoilendranath said.
He also said that samples were collected from both of them for test.
Bangladesh has so far reported 75 deaths and 1,818 coronavirus cases.
Directorate General of Health Services (DGHS) on Thursday evening declared the entire country as ‘vulnerable zone’ to virus infection.
The global death toll from coronavirus reached 146,969 as of Friday.
There have been 2,185,744 confirmed cases around the world after the highly infectious disease was first reported in China in December last year, according to worldometer.
Of those infected, 1,485,452 are currently being treated with 56,601 being in serious or critical condition. So far, 553,323 people had been recovered from the deadly virus.
The World Health Organization declared the coronavirus crisis a pandemic on March 11.