| | Clusters | Infection severity | Provinces |
| | Cluster 1 | Low | Lampang, Lamphun, Mae Hong Son, Nan, Phayao, Phrae, Phetchabun, Sukhothai, Tak, Uttaradit, Chai Nat, Kamphaeng Phet, Phichit, Uthai Thani, Angthong, Nakhon Nayok, Nonthaburi, P.Nakhon S.Ayutthaya, Pathum Thani, Sing Buri, Kanchanaburi, Nakhon Pathom, Phetchaburi, Prachuap Khiri Khan, Ratchaburi, Samut Sakhon, Samut Songkhram, Suphan Buri, Chachoengsao, Chanthaburi, Prachin Buri, Sa Kaeo, Trat, Kalasin, Mahasarakham, Roi Et, Bungkan, Loei, Nakhon Phanom, Nong BuaLam Phu, Nong Khai, Sakon Nakhon, Udon Thani, Chaiyaphum, Amnat Charoen, Mukdahan, Yasothon, Chumphon, Krabi, Nakhon Si Thammarat, Phangnga, Phuket, Ranong, Narathiwat, Pattani, Phatthalung, Satun, Songkhla, Trang, Yala |
| | Cluster 2 | High | Bangkok |
| | Cluster 3 | Average | Chiang Mai, Chiang Rai, Phitsanulok, Nakhon Sawan, Lop Buri, Saraburi, Chon Buri, Rayong, Samut Prakan, Khon Kaen, Buri Ram, Nakhon Ratchasima, Surin, Si Sa Ket, Ubon Ratchathani, Surat Thani |
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