a substance containing a virus or bacterium in a form that is not harmful, given to a person or animal to prevent them from getting the disease that the virus or bacterium causes
vaccine
going through or passing by a specific route or way
via
easy to understand
understandable
to discover something by chance
come across
a machine, usually with wheels and an engine, used for transporting people or goods on land, especially on roads
vehicle
the scientific study of the processes that cause particular weather conditions
meteorology
to make something feel better or less painful, or to help someone who is in trouble
relieve
something that you can see that is created using technology to look unusual or impressive
visual effect
a new idea or method
innovation
to fail to happen
fall through
a helpful or good effect, or something intended to help
benefit
in a way that is easy to understand or see
obviously
by many
widely
a large show at which people who work in a particular industry meet, and sell and advertise their products
fair
the work of an engineer, or the study of this work
engineering
money that is given, usually by a company, to support a person, organization or activity
sponsorship
to need something or make something necessary
require
a gas with no smell or colour, often used as a fuel
methane
to provide something that is wanted or needed, often in large quantities and over a long period of time
supply
the natural environment in which an animal or plant usually lives
habitat
a musical instrument made of metal that produces a ringing sound when struck together
cymbal
someone who speaks or does something officially for another person or group of people
representative
in every part, or during the whole period of time
throughout
someone who scientifically studies humans and their customs, beliefs, and relationships
anthropologist
not using scientific methods
unscientific