1. Send a text message informing your full name and address, as well as the phone numbers of people who have had close contact with you, on the 8889 phone number;
2. Contact your local Disease Control Center for advice;
3. Make an online health declaration at https://tokhaiyte.vn and regularly update your health status.
4. Install Bluezone application to be warned about the risk of Covid-19 infection, help protect yourself and your family: https://www.bluezone.gov.vn/ or download the application on IOS or Android.