Validation of antigen detection test to enter Spain is reduced from a maximum of 24 hours to the 48 hours you have, see public this martes el Official Bulletin of the State.
The resolution of the General Directorate of Health, in relation to the sanitary inspections carried out at the points of entry of Spain, it should be noted that this decision is the subject of a recommendation from the European Union in this sense.
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Hasta now is accepted as valid the certificates of detection of antigen cuya muestra hubiera sido obtenida dentro las las 48 horas anteriores a la llegada a España.
The certificate of testing diagnostics must be included, at least, the following information: Number and title of title, sample of the sample of the master, type of test realized and country of issue.
Reference-www.elperiodico.com