You can take an antibody test in any laboratory that has a license to conduct such studies and transmits the results to the public services portal.
Positive results with any level of antibodies are accepted for registration of the certificate. The certificate can be obtained within three calendar days from the date of submission of the relevant application on the portal of public services.
The certificate is valid for six months from the date of receipt of the results of the antibody test, a re-issue based on such a study is not provided.