Protecting vulnerable groups

• Is your country currently taking any actions to protect vulnerable groups (i.e. groups who are, due to their own health status, highly susceptible to severe COVID-19)? For example, if no obligatory mouth nose protection needs to be worn, are there e.g. specific train compartments where masks are worn or similar measures?
• How do you define vulnerable groups? (Are these primarily groups who define themselves as vulnerable or are defined as vulnerable based on existing evidence?)