Timeline of the COVID-19 pandemic in Thailand

The COVID-19 pandemic in Thailand began with the identification of the first case in the country on 13 January 2020, and has been ongoing since then.

Timeline January 2020

On 13 January, the Ministry of Public Health announced the first confirmed case, a 61-year-old Chinese woman who is a resident of Wuhan. She had not visited the Huanan Seafood Wholesale Market, but was noted to have been to other markets. She developed a sore throat, fever, chills and a headache on 5 January, flew directly with her family and a tour group from Wuhan to the Suvarnabhumi Airport in Bangkok on 8 January, where she was detected using thermal surveillance and then hospitalised. Four days later she tested positive.

Thailand's second case occurred in a 74-year-old Chinese woman who arrived in Bangkok on a flight from Wuhan on 13 January. On 21 January, Nakornping Hospital reported a suspected case of an 18-year-old male patient who arrived in Chiang Mai from Wuhan with a high fever; his blood samples were sent to King Chulalongkorn Memorial Hospital in Bangkok for further analysis. His condition had improved according to an official statement released by Maharaj Nakorn Chiang Mai Hospital on 31 January.

On 22 January, the MOPH announced two additional confirmed cases. The third was a 68-year-old man, a Chinese tourist as in previous cases. The fourth case was the first case for a Thai citizen; a 73-year-old woman hospitalised at in Nakhon Pathom Province, arriving from Wuhan.

The fifth case was confirmed on 24 January involving a 33-year-old Chinese woman arriving from Wuhan with her 7-year-old daughter who was not infected. She admitted herself to Rajvithi Hospital, arrival in Bangkok on 21 January.

On 25 January, the government of Hua Hin District in Prachuap Khiri Khan Province reported a case for a 73-year-old Chinese woman patient who had arrived from Wuhan since 19 January before entering a private hospital in Hua Hin on 23 January. Initial blood sample analysis tested positive; however, authorities are awaiting results from another lab for confirmation.

On 26 January, the Thai Ministry of Public Health said eight cases were confirmed, including one from Hua Hin. All were Chinese, except for a woman from Nakhon Pathom. The first five patients were discharged.

Another six cases were confirmed on 28 January, with five from the same family in Wuhan and another from Chongqing. Thailand began scanning all travellers from China.

On 31 January, an additional five cases were reported, bringing the cumulative number of confirmed cases to 19. One was a local taxi driver who had no records of travelling to China and was thus suspected to have been infected by a Chinese tourist he picked up, making this the first case of human-to-human virus transmission within the country. The taxi driver was reported to have come into contact with at least thirteen other individuals, mostly family members, before seeking treatment. The other cases were Chinese nationals.

February 2020 On 2 February, doctors from the Rajavithi Hospital in Bangkok announced that they had seen the success in treating severe cases of COVID-19 using a combination of drugs for flu (oseltamivir) and HIV (lopinavir and ritonavir), with initial results showing vast improvement 48 hours after applying the treatment. However, it was still too soon to confirm that this approach can be applied to all cases.

On 4 February, the Thai government dispatched a Thai AirAsia plane to retrieve 138 citizens who were trapped in Wuhan following the lockdown, which landed at U-Tapao International Airport at 7:00 p.m. local time. Among the evacuees, six were hospitalised with high temperatures, with the rest subsequently sent to be quarantined in Sattahip Naval Base for two weeks. Three citizens were not evacuated, which included two students with high fever and another with an overstayed visa. On the same day, Thailand confirmed another six cases, including a Thai couple who had just returned from Japan; it was unclear whether they had contracted the virus while travelling or after returning to Thailand. Two new cases were also reported in drivers who had picked up Chinese passengers.

On 8 February, another six cases were confirmed involving two Chinese, and one passenger on board the evacuation flight from 4 days ago and two other Thais who had exposure to tourists. These six cases brought the total count of confirmed cases to 32.

On 11 February, another new case was confirmed, bringing the total count to 33.

On 15 February, the 35th case was found in a 35-year-old Thai woman who worked in a private hospital, marking the first infection in a health worker. An investigation found that she did not wear a mask and protective suit while treating a patient. Several previous reports erroneously claimed that she worked for Bamrasnaradura Institute, which was later refuted and clarified by the MOPH.

After 8 days with no reported cases, two more cases were confirmed on 24 February, bringing the number to 37. Two days later, the number of confirmed cases went up to 40, two of which were Thai nationals who had recently been to Japan. The elderly couple, who had just returned from Hokkaido, had already spread their virus to their 8-year-old grandson at home before seeking treatment. 101 high-risk individuals whom they came into contact with were tested for the virus, including fellow tour group members, family members, passengers on their returning flight, medical workers and the grandson's classmates; 97 tested negative while 4 are still awaiting confirmation. The grandfather was criticised by Public Health Minister Anutin Charnvirakul for initially refusing to disclose his travel history when interrogated by doctors, as he was at risk of becoming a super-spreader.

On 29 February, a new case was confirmed, bringing the total count to 42. A 21-year-old salesman whose job brought him exposures to foreign travellers tested positive for SARS-CoV-2.

March 2020

On 1 March, MOPH reported the first confirmed death in Thailand, a 35-year-old Thai who was originally diagnosed with dengue fever at a private hospital in late January. He was later transferred to Bamrasnaradura Institute on 21 February after testing positive for COVID-19, where he received treatment and had since fully recovered by 16 February. However, the damage the virus had done to his lungs was beyond recovery and he died from multiple organ failure on 29 February. The ministry is currently carrying out investigations to find out which disease is the main cause of his death. On the same day, King Power issued a statement identifying the man who had died as one of the company's partner-product consultants at their Sivaree branch store. The branch has been closed since the day he tested positive for the virus and all staff examined by health officials.

On 21 March, Thailand reported 89 new cases, the largest single-day rise since the virus reached the country. All Bangkok markets and malls were ordered to close from 22 March until 12 April in response. On March 24, three new deaths were announced, all of whom were Thai nationals: a 70-year-old male who had tuberculosis, a 79-year-old male linked to the Lumpinee Boxing Stadium cluster, and a 45-year-old male who had diabetes. Four medical workers were also announced to have been infected with the virus after coming in contact with patients who refused to reveal their travel history while seeking treatment.

April 2020 From the middle of April until the middle of May, there were travel bans at the province level, and (at least in Phuket) down to the tambon (parish) level. All beaches were closed. A curfew was in place from 10pm until 6am. Mask-wearing became mandatory in shops and banks, and temperature checks were performed on entry to many of these locations. Restaurants and bars remained open. There were a very few reports of infections. Food poverty became an issue, and donations were distributed through temples and some private organizations; districts also organized distributions of basic food supplies to residents.

May 2020

June 2020

July 2020

On 15 July, the national centre for COVID-19 has announced two new infected cases; an Egyptian soldier in Rayong Province, and a Sudanese diplomat's daughter in Asok neighbourhood of Bangkok. Both of them were the government's exceptions for "VIP guests," not requiring to comply with several COVID-19 measures. The government also keep secret the high-risk areas that both patients have been located during their stay until 16 July, infuriating many netizens who were afraid of the possible second outbreak. Many criticised both the government's failure to contain the disease from those VIPs and its failure to boost the heavily affected tourism industry in Rayong Province where more than 90% of hotel bookings were cancelled. This situation was considered the eruption point of the coming protest on 18 July.

On the same day, the Prime Minister Prayut Chan-o-cha made a visit to Rayong Province. Prior to his arrival were two protesters held signs calling for his resignation. Both were immediately arrested and reportedly beaten by the police, infuriating many Twitter users.

On 18 July, Thailand saw the largest street demonstration since the 2014 Thai coup d'état The protests later spread nationwide, collectively called the 2020 Thai protests, amidst the COVID-19 pandemic.

August–October 2020 Even though there had been no new domestic cases since mid-May, on 21 August, the CCSA announced that it decided to extend the Emergency Decree until 30 September, claiming that it was necessary to use its power to prevent incoming aliens from overseas in many routes, and that Thai people' daily lives were not affected, since CCSI had already loosen its restriction on activities such as academia reopen. International rights groups have criticized the emergency decree being employed to suppress free speech.

In September, a prison inmate who had not been abroad was Thailand's first locally transmitted case in 100 days. Later in the month, footballer Akbar Ismatullaev was infected with the virus after already completing the 14-day state quarantine since arriving nearly a month earlier. In October, foreign tourists entered Thailand for the first time in seven months under the Special Tourist Visa program. A total of 1,201 visitors arrived in the month, compared to 3.07 million in the same month a year earlier. A French tourist on Ko Samui in Surat Thani contracted the disease after passing the 14-day state quarantine. She developed a fever 17 days after arriving in the country.

November–December 2020

In November, the government extended the coronavirus emergency decree for the eighth time, approving a 45-day extension until 15 January 2021. Starting at the end of the month, at least ten cases were detected in Thai women who had illegally crossed the Myanmar border into Mae Sai District from Tachileik. They made long-distance travels, including by bus and by air, and some attended large gatherings, prompting authorities to impose quarantine on people who may have come into close contact with them.