The Vineyard reported one new positive coronavirus case on Thursday, bringing the Island’s total caseload to just shy of 30, nearly two months into the outbreak.

Island board of health agents reported the new positive case, a woman in her 70s, in their daily case update Thursday afternoon. The individual is the first person over the age of 70 to test positive on the Island.

Like the new case reported on Wednesday, the woman is an Island resident who was tested for the virus off-Island.

The Island has now had 25 individuals test positive for the virus, and four individuals test positive for viral antibodies. The two most recent positive tests, and the four positive antibody tests, have all occurred off-Island, according to Tisbury health agent Maura Valley.

The Martha’s Vineyard Hospital has the only certified coronavirus testing lab on the Island. In their daily testing update, the hospital reported that it had tested 633 patients for the virus, with 23 positives, 603 negatives and seven pending. No one is currently hospitalized with the virus.

In a change of criteria, the state DPH also announced a further expansion of testing, saying in a letter to hospitals that all close contacts of positive coronavirus patients should be tested for the virus, as well as all symptomatic patients. Martha’s Vineyard Hospital spokesman Katrina Delgadillo said the hospital follows DPH testing guidelines.

“All individuals in Massachusetts identified as a close contact by a local board of health, the Massachusetts Department of Public Health, the Community Tracing Collaborative, or a healthcare provider should be tested,” the letter said.

Close contacts include anyone who was within six feet of a covid-positive patient for 10 to 15 minutes, or individuals who came into contact with infections secretions from a positive patient.

The letter also said that all symptomatic individuals in the state, including those with mild symptoms, should be tested. The listed symptoms include fever and chills, shortness of breath, fatigue, sore throat and body aches, and loss of taste or smell. Other less-common symptoms could be gastrointestinal, like nausea and vomiting, or inflammatory conditions such as “Covid toes” the letter states.

Asymptomatic individuals can be recommended for diagnostic testing at the discretion of their healthcare provider, a state agency, or an employer, according to the letter.

Regarding antibody tests, the DPH expressed skepticism about their ability to be used for diagnostic purposes, saying that they should not be used to release patients from isolation or for return to work purposes at this time. The hospital has previously stated that they are closely following the science on antibody testing, and do not have plans to provide antibody tests yet.

“Antibody tests may demonstrate whether an individual was previously infected with SARS-CoV-2 and antibody testing is important to help understand how many people in a population have been exposed to the virus,” the letter states. “However, antibody tests are not indicated for diagnostic purposes. In order to be appropriately interpreted, more data are needed on the performance characteristics of these tests, the immune response to COVID-19, the timing and duration of antibody response, and how antibodies correlate to protective immunity.”

The expansion in testing comes as Gov. Charlie Baker announced in his daily press briefing that he wanted to up the state’s testing capacity from approximately 30,000 tests per day to 45,000 tests per day by the end of July.

“Expanding testing is critical to opening workplaces and businesses,” Governor Baker said.