Information on the rescue operation, the health of those rescued - and their identities - has been tightly guarded by Thai authorities.
Four boys were successfully rescued on Monday during a gruelling eight-hour rescue operation after four boys were brought to safety on Sunday.
The news comes after four boys were rescued when the operation began on Sunday.
The boys can all eat bland foods, but they can't eat anything spicy.
Musk says he hopes the device could help in the rescue of the remaining people.
The 12 boys and their coach were trapped by flooding in the cave more than two weeks ago.
4 out of 12 boys and their coach await rescue in Thailand. But rescue officials were also anxious about dwindling oxygen levels in the cave.
The football team named Wild Boars entered the complex cave system after they had entered it on June 23 for the objective of exploration but got stranded after sudden flooding caused by heavy rain blocked the exit.
Graphic: The Thai cave complex where four boys and their soccer coach remain trapped is expansive, stretching about 10 km.
The head of the operation, Narongsak Osottanakorn, said rescuers had learned from experience and were two hours faster in bringing the second batch of survivors out. He said a medic and three SEALS in the cave, who've been looking after those trapped, will also come out.
Mr Jedsada said they were uncertain what type of infections the boys could face "because we have never experienced this kind of issue from a deep cave".
"The kids are footballers so they have high immune systems", Dr Jedsada said.
The four rescued on Monday were rushed to a hospital to join their other rescued teammates in quarantine in case of infection.
Four boys and their soccer coach remain in the cave. The first rescue mission of the soccer team commenced on Sunday, July 8.
The boys are expected to remain hospitalized for at least a week, meaning they won't be able to take up FIFA's invitation to attend the World Cup final in Russian Federation.
Musk has been tweeting about the rescue mission for the last few days.
Nargonsak said this phase may take longer than the previous two rescue missions, which both lasted several hours.
While in the cave on June 23, a heavy rainfall had poured, blocking the entrance and forcing them to go even deeper and trapping them.