The rescue began yesterday with the first four boys brought out.
Sunday night, teams of divers brought out four of the trapped boys to waiting ambulances.
The optimistic mood was in contrast to the saddened atmosphere at the cave last week, after former Thai Navy SEAL Saman Kunan, 37, died while laying air tanks underground on Thursday.
"The machine has already been delivered to Thailand and ready to use in the rescue operation in a partially flooded cave Khao Luang", - he wrote.
Rescuers brought out the last five on stretchers, one by one over the course of Tuesday, and they were taken by helicopter to hospital.
The final push is on to rescue the four remaining boys and their football coach trapped in a Thai cave.
Chief of the rescue mission, Narongsak Osottanakorn, declined to comment on the identity of the four people brought out in the evening, saying updates would be supplied at a news conference that is scheduled to be held late on Monday.
A spokesperson from the Thai public health authority said that they were in "high spirits" and also claimed that as they are football players, they have high immune systems.
For now the boys remain in quarantine but some of their parents have been able to see their children through the glass.
Experts warned that drinking contaminated water or otherwise being exposed to bird or bat droppings in the cave could lead to risky infections.
Officials said they had low body temperatures coming out of the caves.
The mission to save all the trapped is a race against the clock with heavy rain expected this week which would again flood the tunnels with fast-flowing, rising water.
Chiang Rai Gov. Narongsak Osatanakorn says the rescue mission began at 10.08am and involves 19 divers.
Narongsak decided on Sunday to launch the rescue operation after being assured the water had receded and the boys' health was improving thanks to nourishment given them by the SEALs team.
British divers found the 13 a week ago.
Officials said the boys freed Sunday were hungry but in good health, and had asked for holy basil stir-fried rice, a popular Thai dish.
Hospital officials said the boys could eat bland foods, but not anything spicy. He added, "They still need to be kept away from their parents and others due to fear about infection".
All eight boys rescued on the first two days are being treated in an isolation ward in a Chiang Rai hospital.
Authorities have not confirmed the identity of the rescued boys.
While the eyes of the world have been focused on the Thai soccer team being rescued in a cave, entrepreneur Elon Musk has been hatching a plan. It is now unclear whether Musk or his technology will be used in the rescue efforts, but Musk confirmed via tweet that the submarine is in Thailand and ready to be used if needed.