Gov. Charlie Baker announced Tuesday that the state stay-at-home order would be extended to May 18, while leaders at the Martha’s Vineyard Hospital confirmed one more positive case of Covid-19 on the Island.

A total of 17 people have now tested positive out of  376 tests conducted by the hospital. There have been 356 negative tests and three are still pending. The hospital currently has no patients hospitalized with the virus, and reported no new transfers off-Island. Approximately 60 tests, or around 20 per cent, were for health care workers, according to head of nursing Claire Seguin. The hospital previously reported that one hospital employee has tested positive for the virus.

Hospital officials said one person has died who was treated on the Island for Covid-19 and transferred to a Boston hospital. But the cause of death was "not proven” to be related to coronavirus, spokesman Katrina Degadillo said in an email.

At a press briefing Tuesday morning, president and chief executive officer Denise Schepici expressed grave concerns about the coming season, urging extreme caution as summer arrives, bringing more people and visitors. The briefing was hosted by Ms. Schepici, Ms. Seguin and Ms. Delgadillo.

“As we look ahead to our summer months and consider what the opening of our Island would look like . . . I continue to focus on one word: density,” Ms. Schepici said. “We need to avoid large groups and gatherings for the foreseeable future.”

“We know the state is still concerned about the surge, and if the state is not over the surge, then neither are we,” Ms. Schepici also said. “And we cannot let our guard down.” All non-essential businesses in the 

The Massachusetts Department of Public Health reported 1,840 new confirmed cases of coronavirus on Tuesday, and 150 new deaths.  Statewide, there are more than 58,000 confirmed cases of Covid-19, and 3,153 people have died.

Hospital officials also announced that they would be cancelling their three main summer fundraising events due to concerns about the pandemic. Those include the Sullivan 5K race that normally takes place in East Chop during August, the Windemere auction and the annual charity golf tournament in July.

“Many of you know a number of events have been cancelled for the summer, and that is the prudent thing to do for everyone’s safety, unfortunately,” Ms. Schepici said.

She emphasized her concerns about the overwhelming case numbers throughout the state, and said the Island must continue to take all extra precautions, especially as certain parts of the economy opened.

Under new guidelines Monday, five Island towns allowed one and two-man crews to get back to work.

At the briefing Tuesday, Ms. Schepici expressed outrage after viewing a photograph that appears on the home page of the Gazette website. The picture taken Monday morning of the ferry arriving in Vineyard Haven shows passengers exiting the freight deck, closely grouped in tight bunches, with only about half of them wearing masks.

“I was shocked and dismayed when I saw the photo on the front page of the Gazette of workers without masks on,” Ms. Schepici said. “We are worried about them.”

She added:

“Please, please wear a mask. We ask them to do this not only for themselves, but for everyone around them.”