New data from the Boston Public Health Commission offered a stark reminder Saturday that senior citizens are not the only ones vulnerable to the coronavirus pandemic.

A city-issued text said "Nearly 80 percent of COVID-19 cases in Boston were in persons 20-59 years of age. We need your help: Stay at home, wash your hands, do not socialize in person." About 21% of cases were in people between the ages of 20 and 29.

The Public Health Commission data also showed regional differences in infection rates around the city. As of April 2, the city had a rate of 18.1 infections per 10,000 residents, but in Hyde park the rate was 30.4 and in East Boston it was 27.7.

Boston cases so far have been split almost exactly evenly between males and females.

As of Thursday afternoon, Boston had tallied a total of 1,232 confirmed cases of COVID-19. Of these, 96 required hospitalizations, and ten patients had died.