PHILADELPHIA (CBS) — The number of coronavirus cases has climbed in Philadelphia to 18 as the statewide total rose to 104. Philadelphia Health Commissioner Dr. Thomas Farley announced nine new cases on Tuesday.

Farley says some of the cases did not travel internationally and had no known contact with previous cases. He says it’s showing the virus is circulating within the community.

JUST IN: #Philadelphia Health Commissioner Dr. Thomas Farley: 9 new cases in #Philly, brings city COVID-19 total to 18. Some of the cases did not travel internationally and had no known contact with previous cases. Shows that virus is circulating within the community. — Trang Do (@TrangDoCBS3) March 17, 2020

Meanwhile, in the surrounding suburbs, there are four more in Montgomery County, three more cases in Bucks County, and two each in Chester and Delaware Counties.

Montgomery County is now dealing with 34 COVID-19 cases.

All the patients are either in isolation at home or being treated at a hospital.

The total number of cases rose statewide rose by 20 since Monday.

“Pennsylvanians have a very important job right now: stay calm; stay home and stay safe. We have seen case counts continue to increase and the best way to prevent the spread of COVID-19 is stay home,” Pennsylvania Health Secretary Dr. Rachel Levine said.

Health officials say there are 879 patients who have tested negative.

Officials are asking healthy residents to donate blood and food, call on senior neighbors and to stay home.

UPDATE: PA Dept of health asking that healthy residents donate blood, donate food, call on senior neighbors, and stay home. — Jessica Kartalija (@JessKartalija) March 17, 2020

Gov. Tom Wolf has ordered all nonessential businesses to be shut down to control the outbreak, including schools, restaurants and bars.