On Saturday, DDC director-general Dr Opas Kankawinpong said that the vaccine had been distributed to 13 provinces, and injected continually to people in risk group – elders, medical personnel and those with serious diseases.
He said a few people had experienced side-effects from the vaccination, but it was not severe.
He urged people to observe themselves after the vaccination. Normally, 15 minutes of observation is advised, but the Ministry of Public Health has urged people to observe for 30 minutes before leaving the hospital or continuing their work.
Opas said that the side-effects could be mild or severe.
Mild side-effects include low fever, headache, nausea, vomiting, weakness and pain in the area where a person was injected. These effects normally lasted one to two days, the director-general explained.
Severe effects are high fever, difficulty in breathing, severe headache, twisted mouth, weak muscles, rash, vomiting more than five times and even becoming unconscious.