Students wearing face masks gather on the campus of King's-Edgehill School on Monday. (THE CANADIAN PRESS/Andrew Vaughan)

The four Nova Scotia students who contracted swine flu have recovered, though 27 others with flu-like symptoms remain in isolation, school officials say.

Joe Seagram, headmaster of King's Edgehill private school in Windsor, provided the update Monday, a day after the four cases were confirmed.

Seagram said some parents were keeping their children home and attendance was lower than normal, though he didn't give any numbers.

"I suspect it will pick up as people are reassured by the news. I'm hoping that things will get back to normal as the week progresses," Seagram told reporters.

The four confirmed cases of swine flu at the school in Windsor were among the first in Canada. Compared to Mexico, where nearly 150 people are suspected to have died from the outbreak, the cases were relatively mild.

Seagram said none of the students who were confirmed to have the virus were hospitalized. He said three of them, and a number of others who had flu symptoms, have been cleared to return to class.

Dr. Mark Kasimirski, the school's physician, said he heard the fourth student, who is in Halifax, has also recovered.

Still, 27 students remain isolated from other students, while two staff members are at home, Seagram said.

Seagram said the students who remain in isolation are together in a central residence. They can watch TV, go online and interact with each other, but they've been told to remain behind closed doors.

"These are smart kids who are very responsible," Seagram said.

Public health officials suspect the virus was spread by students after a school trip to Mexico's Yucatan Peninsula earlier this month. Of the four students confirmed with the virus, only one was on the trip.

Seagram said no one thought it was the swine flu at first, particularly because the students were sick outside the incubation period and the outbreak in Mexico was in a different region.

Seagram said he got the test results confirming swine flu on Sunday morning.

He said he's pleased with the way the school has handled the matter. Public health officials are notified for any form of the flu, he added, noting the only thing the school is doing differently now is swabbing students twice for testing instead of only once.

Classes are running as usual, though attendance has dropped.

"We're all operating on a day-to-day basis and we're all trying to figure out what really our comfort levels are," Seagram said.

Seagram said his two children are still going to class.

Dr. Robert Strang, the province's chief medical officer, said there have been no other confirmed cases of swine flu in Nova Scotia, but public health officials continue to monitor the situation closely.

"This is a very fluid situation which is changing rapidly," Strang said late Monday afternoon.

In an interview with CBC News earlier in the day, Strang said he had heard reports of a rush of patients with influenza symptoms at the emergency room at Hants Community Hospital.

However, Kasimirski, who's also the hospital's chief of staff, said he believes most of those flu cases are unrelated to the swine flu cases at King's Edgehill.

Eva Lake, 76, who lives in the Windsor area, said she's not afraid, though she'll be washing her hands more frequently.

"It's too bad it's here in Nova Scotia, but I guess we can't escape it," Lake said. "I don't go out a lot, so hopefully, I don't run into anyone with it."