30/03/2020: Casual contacts with a possible; probable; or confirmed case of COVID-19 should continue with normal work activity and surveillance of symptoms. Close contacts with a possible; probable; or confirmed case of COVID-19: the worker will be removed from work activity and will be quarantined at home for 14 days with active monitoring of symptoms. Carrying out a diagnostic test by PCR will be assessed after 7 days. If the PCR is negative; the person can return to professional activity; 30/04/2020: same as before; 22/05/2020: Close contacts of confirmed cases will quarantine at home for 14 days from the date of last contact with the case. If during the 14 days of quarantine you develop symptoms; you will be considered a suspected case; you must immediately self-isolate in your place of residence and urgently contact the person in charge established for your follow-up. If the contact is still asymptomatic at the end of their quarantine period; they can return to their normal routine; 08/06/2020: same as before; 15/02/2021: In the event of any suspicious case in working people; isolation will be maintained pending the result of the PDIA until 3 days have elapsed since the resolution of the fever and the clinical picture with a minimum of 10 days from the onset of symptoms. It will not be necessary to carry out a PCR to lift the isolation or to return to work. In asymptomatic cases; isolation will be maintained until 10 days have elapsed from the date of taking the sample for diagnosis; 16/07/2021: Vaccinated contacts: workers who have received a complete vaccination schedule and are considered close contacts will be exempt from quarantine; if they use appropriate PPE; 22/12/2021: Quarantine will be indicated for 10 days after the last contact with a confirmed case. The contact will be instructed to remain at home during quarantine. Additionally; if during the 4 days after the end of the quarantine the appearance of symptoms continues; the person must remain isolated at home; 30/12/2021: In close contacts who are not vaccinated; the quarantine will be 7 days as long as they do not develop symptoms during this period. In the following 10 days after the last contact; they must take extreme protection measures. In close contacts; both vaccinated and unvaccinated; performing PDIA will be prioritized for vulnerable people and people who care for them (professionals or relatives) as well as the health or socio-health personnel; 25/03/2022: Close contacts will not quarantine. However; during the 10 days after the last exposure they should take extreme precautions and reduce social interactions as much as possible. In the event of the appearance of symptoms; they should act as indicated for all persons with symptoms compatible with COVID-19.