Updated July 20 at 5:20 p.m. ET:
New York City now reports there were 13 confirmed deaths due to COVID-19 on July 11, the 24-hour period in which Mayor Bill de Blasio had said that no deaths were reported.
"The mayor was very clear that the information was preliminary and subject to change," a spokesperson for the city told NPR on Monday.
De Blasio made the announcement on July 13, but since then, more complete data has been released.