The number of Mainers who have been diagnosed with COVID-19 during the past three weeks has increased to 275, according to the Maine Center for Disease Control and Prevention.

Of those 275, 41 patients have recovered and been released from isolation. Three of the 275 patients have died — all from Cumberland County. Forty-nine have been hospitalized during the course of the outbreak.

Maine CDC Director Dr. Nirav Shah said Monday that 6,088 people have tested negative for the new virus since testing began earlier this month.

Four Knox County residents have been confirmed with COVID-19 as of Monday.

On Saturday, Pen Bay Medical Center in Rockport announced in a news release that two of its doctors had been diagnosed with the new virus. Those doctors are self-isolating at their homes and their illnesses are mild.

Dr. Shah said 43 of the people who have been diagnosed are healthcare workers. He praised the healthcare workers saying while other people have been told to say home, they are rushing to the front lines to combat the outbreak.

Dr. Shah said Monday that while a few people with the jails of Maine have been tested, no one within the corrections population in Maine have been diagnosed.

The number of Lincoln County residents with COVID-19 has increased to eight. Two Waldo County residents have been diagnosed with the virus as of Monday. The first confirmed Waldo County patient was a nurse from Waldo County General Hospital who is self quarantined at home.

The 275 cases on Monday is up from 253 cases on Sunday, 211 on Saturday, 168 on Friday,155 cases on Thursday , 142 on Wednesday, 118 on Tuesday, 107 cases on Monday, 89 on Sunday, 70 on Saturday and 56 on Friday. The first case in Maine was not confirmed until March 12.

Cumberland County accounts for the majority of the cases with 154 residents of that county testing positive as of Monday. There are 53 York County residents confirmed with COVID-19, 12 in Penbscot County, and 10 in Kennebec County.

The statistics are classified based on the permanent state residence of the patient but where they were diagnosed. If seasonal residents have been diagnosed in Maine, they would not be included in those figures.

Dr. Shah has repeatedly urged people to live their lives as though COVID-19 was in their community by adhering to physical distancing, washing hands, staying home from work if ill, and coughing into your sleeve.

The CDC director said his recommendation would be for anyone who has come to Maine from another part of the country where there are high numbers of COVID-19 and are not feeling well, to stay indoors and self quarantine. The U.S. CDC has recommended a travel ban for people in Maine, New Jersey, and Connecticut.

He said March 25 that the office would try to compile statistics on whether the patients comes from out-of-state. That has not yet been done.

The state statistics also show that people in their 60s account for the largest age group with the virus. There are 63 people in their 60s with the virus, 48 in their 50s, 46 in their 40s, 35 in their 70s, 29 in their 20s, 26 in their 30s, 24 in their 80s,and four younger than 20.

Most cases of COVID-19 infection bring flu-like symptoms that are mild to moderate and can be treated at home, though in a percentage of cases, mostly involving older people or those with underlying health conditions, it can be serious. Patients concerned they may have contracted COVID-19 are urged to call ahead before presenting at a doctor’s office, clinic or an emergency department.

Knox County has a greater percentage of seasonal residences than the state average. According to the 2010 Census, 16% of housing units in Maine were seasonally occupied. In Knox County, the percentage is slightly more than 20%.

On North Haven, for example, 65% of residences are seasonal, according to the 2010 Census. The North Haven Select Board voted March 15 to prohibit non-residents from coming to the island but later rescinded the order because it violated state law. St. George has the most seasonal homes at 762 which is about 34% of all residences in the town.

Dr. Shah said March 25 COVID-19 raises more concerns than the seasonal flu. He said that with COVID-19 the average person can spread it on average of two to three additional people rather than one to 1.5 for people with the seasonal flu.

But COVID-19 also has five to 20 times a greater mortality rate than the seasonal flu, the CDC director said Wednesday. He said that the COVID-19 outbreak is occurring as the influenza cases are near peak, adding stress to the health care system.

Dr. Shah pointed out that statistics internationally show that 80 percent of people with COVID-19 show slight symptoms such as having a cold. But the remaining patients have more serious symptoms and some will require intense medical care.

There are 176 intensive care hospital beds in Maine and 92 are available as of Monday, Dr. Shah said. There are 309 ventilators in Maine and 253 are available. He said there are also 87 other ventilators used in operating rooms that could be used to treat COVID-19 patients if needed.

The Maine CDC, however, has asked for 400 more ventilators to handle the potential number of cases in which people need breathing assistance.

He said the state has yet to receive an adequate amount of equipment including personal protection equipment from the federal government.