NewsThailandUpdate COVID-19 What Should You Do If Antigen Test Kit Result is Positive or Negative By Pattaya Mail January 14, 2022 0 1114 Share on Facebook Tweet on Twitter tweet Infographics. Negative: Self isolate and repeat an ATK test after 3 – 5 days Positive: Self isolate and contact a health facility. To confirm the result, taking an RT-PCR test is recommended (NNT)