First, he resisted closing the schools until the Governor forced him to do so. However, it was too late as many students became either affected and or became carriers who passed it on older relatives, resulting in the City having over 25,300 affected residents (300 fatalities) and rising. Worse, as staff reported becoming affected by the coronavirus, the DOE failed to close the schools as the State required as both the Mayor and Chancellor, Richard Carranza, did not want to close the New York City Public Schools. Read the New York Post's Susan Edelman on Brooklyn Tech. Finally, where was the City not using their massive budget surplus to buy medical supplies rather than wait for the State and Federal governments to do so?
Mayor Bill de Blasio was too late in closing down the City and allowed the cronavirus to spread and even today, the Governor blasted the Mayor for allowing groups to congregate in parks and other gathering places and gave the Mayor 24 hours to enforce his edict. In addition, the Mayor still allowed ticketing for alternate street parking until Tuesday, while telling people to stay indoors, what a hypocrite!
Of course the Mayor's failure to lockdown the City was because he wanted tourist dollars to continue to stream into the City, which allowed thecoronavirus to come along with the turists as well. The Mayor's reluctance to close schools and tourist attractions like Broadway shows and the parks contributed to the rapid spread of the coronavirus, because it was all about the money.
Note: Chancellor Richard Carranza decided that all non-essential DOE employees work at home. Interestingly, the Chancellor himself started to work at home last Friday while DOE employees must report to their jobs on Friday, risking getting infected by the coronavirus from co-workers.