Anan Sahoh was then found slumped dead in a car on Tuesday afternoon while taking a train the previous day from Bangkok to Narathiwat in southern Thailand.
The 56-year-old was then tested positive for Covid-19.
Anyone on the car was sentenced to quarantine for 14 days and the train was disinfected.
But after checking the station’s video surveillance, officials were shocked to see Anan spitting on the man in front of him as he bought his ticket.
The images show the Thai man in Islamic attire shackled on a crutch – ignoring the lines of social distancing on the ground – spitting in the man’s face.
He then walked away and took the train in which he was found dead.
Thai authorities are now desperately trying to locate the victim after he feared he was infected with the deadly disease after the incident at Bang Sue station in Bangkok.
The director of the Thai National Railways, Thakoon Intrachom, said: “We are now worried about a man who was spit on the security camera footage. At first we coordinated with the railroad police, but they haven’t found it yet.
“We want to announce that if someone knows or has heard of the news, they should go to the hospital immediately.
“The doctors said that Anan, who lives in the Muslim majority in southern Thailand, had recently returned from Pakistan and transited through the country’s Suvarnabhumi airport.
He had a “fit to fly” health certificate and was not detected by thermal analyzes or temperature checks at the airport.
Anan then boarded the train and the temperature controls at the station would have shown a normal temperature of 36 ° C.
However, the man developed a cough and vomited during the journey – during which the train personnel took a photo of him and his identity card – but his condition had improved by the time the train was arrived at Hua Hin station.
The authorities checked his temperature again and it was still 36 ° C.
They advised the passenger to rest at Hua Hin station, but he insisted on continuing his journey.
At approximately 10:15 p.m., train personnel discovered that the passenger had collapsed in front of the washroom when the train reached the Thap Sakae neighborhood of Prachuap Khiri Khan.
Coronavirus self-isolating hacks
Doctors tested her body, which came back positive for Covid-19.
The governor of the state railways of Thailand, Voravuth Mala, said he had sent a list of 15 passengers on the same wagon as the deceased passenger to the public health office and quarantined 11 people, including two staff from Bang Sue station, a security guard, seven railroad workers and a railway police officer.