Essential/key worker – a worker who provides a vital service, for example, a member of the police force, a health worker, teacher, bus driver, food-shop assistant, or post office worker

Essential services – these include services, such as hospitals, water works, power stations, schools, transport, and waste collection, that have been listed by a government as vital to support people in a pandemic.

Germs – tiny living, or non-living, things that can grow in number and cause disease.

Health worker – a worker who works in health care, for example, a doctor, nurse, carer, or occupational therapist.

Lockdown measures – measures that aim to keep people confined in their homes for much or all of the time and prevent them from moving and travelling around except for essential travel.

PPE (personal protective equipment) – this includes equipment such as face masks, aprons and gloves.

Physical distancing (also known as social distancing) – measures intended to prevent the spread of a contagious disease by trying to ensure people stay a certain distance away from each other, therefore reducing the number of times people come into close contact with others.

Practise – to perform or do something on a regular basis.

Self-isolation – staying at home and keeping away from other people because you have, or might have an infectious disease, and do not want to risk spreading it to others, or because you are particularly concerned about catching it. 

Vaccine – a substance used to stimulate the body to produce defence cells and substances against one or more diseases.