Martha’s Vineyard health officials reported no new coronavirus cases for a ninth straight day on Monday, while updated demographic information from the Island boards of health Friday showed that nearly 80 per cent of the Island’s Covid-19 patients had recovered.

In their expanded demographic update, the six boards of health reported that the Island has had 27 residents test positive for the virus since the outbreak began — a number that has held steady for nearly a week. Of those 27 cases, 21 have been completed, five are still in progress, and one was lost to follow, meaning boards of health were not able to contact the patient.

A completed case means that the patient is no longer symptomatic and has been released from isolation.

The five cases that are still in progress include the three most recent positive tests on the Island, taken between May 10 and May 16, as well as one case from the last week of April and one case that dates to the last week of March.

Twelve male and 15 female patients have tested positive for the virus, with the age breakdown as follows: two patients under 20, five patients in their 20s, two patients in their 30s, two patients in their 40s, eight patients in their 50s, seven patients in their 60s and one patient over 70.

Tented area set up for overflow patients has come down. — Jeanna Shepard

Eighteen of the cases, or 66 per cent, are linked to another case, with those cases divided into seven separate family or household groups.

According to town-by-town data released by the state Department of Public Health on Wednesday, there are seven cases in Edgartown, seven cases in West Tisbury, six in Tisbury, five in Oak Bluffs, less than five in Chilmark, and zero in Aquinnah. The DPH does not provide specific case numbers for towns with less than five cases.

In its daily testing update Monday, the Martha’s Vineyard Hospital reported that it had tested 822 patients for the virus since the outbreak began, with 25 positives, 783 negatives and 14 pending. The two other positive tests were conducted off-Island.

The Island has also had seven residents test positive for viral antibodies. Three of those cases are friends/acquaintances, and another three are family members, according to board of health data.

The total number of coronavirus patients on the Island, including those who have tested positive for antibodies, remains at 34.

Statewide, testing numbers, as well as hospitalizations and deaths, have been declining over the past week as Gov. Charlie Baker announced his plans for slowly reopening the state.

On Monday, the DPH reported 596 new cases in the state and 44 more deaths. The state has now had 93,271 people test positive for the virus and 6,416 deaths.

The first phase of a four-phase gradual “Safer-at-Home” reopening plan for the state was set to begin on the Memorial Day holiday Monday.

Much more testing is expected on the Vineyard beginning next week when a comprehensive testing program for the Island is set to roll out. A drive-through testing site will be set up at the regional high school as part of a public-private partnership between Quest Diagnostics, Island Health Care, a federally qualified community health center, and the Vineyard boards of health. Free testing will be available, eventually for all Islanders who want it. The program will run through Labor Day.

The hospital has also been doing testing by physician referral at a drive-up site since March. With 25 beds and limited capacity to handle acute respiratory cases, the hospital set up a sophisticated intake system at its emergency room early on in the outbreak to receive patients with Covid-19.

Late this week, a tented exterior 12-bed unit that had set up as to handle overflow patients with Covid-19 in the event that the ICU became full, was taken down.

But hospital president and chief executive officer Denise Schepici, who has been holding weekly press briefings to update and inform the public about infection rates and other hospital matters, warned that the pandemic is not over.

“We know we are not out of the woods with this virus yet,” Ms. Schepici said.

The weekly briefings will continue.