Danilo Abarzosa, director of the Philippine National Police Academy (PNPA), said the four were among the 56 cadets who underwent swab examination as they exhibited flu-like symptoms.
said 36 cadets have suffered from pneumonia.
Those tested positive for flu are still quarantined at the PNPA infirmary.
, meanwhile, said the four cadets are positively responding to the antibiotics given to them.
added that they are now recovering from the virus and are far from danger.