For more information about the corona virus in Thailand you might better have a look at Wikipedia about the 2020 coronavirus outbreak in Thailand or Department of Disease Control Thailand : Viral Pneumonia.
The corona virus is now a worldwide pandemic according to the WHO. And the Thai government is taking all kind of strict measurements to prevent further escalation in Thailand. So if you are planning to go traveling to Thailand please check the situation in regards if you can fly to Thailand and if you are welcome. For Questions & Answers about this see DDC Q&A. Another good information website is IATA - International Travel Documents News.
Just as all over the world major events are cancelled in Thailand, like many parts of Songkran are cancelled and the GP of Thailand. Also be aware that some airlines are canceling domestic flights. Although the TAT still tries to sell the sunny beaches of Thailand they also have Thailand Tourisme Updates.