I participated in the Sinovac vaccine trial , 6 weeks ago first shot 4 weeks ago second shot , I was wondering if I was in the real vaccine arm or placebo arm , as I had no complaints after the shots I thought I had placebo . Last week after antibody testing I got the good news , test showed I have plenty of antibodies against Covid . To celebrate this very good news I decided to visit Brazil in February . Pity the Rio Carnaval was postponed to July . Hope Thailand announces soon no quarantine for the vaccinated visitors .