The comedian said he had worn blackface several times in the past.
Some 8,117 people who tested positive had their case transferred to the Test and Trace system - but only 5,407 were reached.
They said they had tried many times to remove it through the political process but without success.
Piers Morgan called the comments "hurtful nonsense" that will cause "such distress to so many families".
Home Secretary Priti Patel is understood to have had a ‘firm’ conversation with Andy Marsh over the issue.
Neil Ferguson, professor of mathematical biology at Imperial College London, said thousands of deaths could have been prevented with earlier action.
The daily death toll peaked on April 8 at 1,441.
It comes just hours after Education Secretary Gavin Williamson performed a dramatic u-turn over similar plans in England.
The new campaign comes days before the third anniversary of the disaster.
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