今日のレッスン ワクチンワクチン（vaccine）はヒトなどの動物に接種して感染症の予防に用いる医薬品。毒性を無くしたか、あるいは弱めた病原体から作られ、弱い病原体を注入することで体内に抗体を作り、以後感染症にかかりにくくする。
A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism, and is often made from weakened or killed forms of the microbe or its toxins. The agent stimulates the body's immune system to recognize the agent as foreign, destroy it, and "recognize" it, so that the immune system can more easily recognize and destroy any of these microorganisms that it later encounters.
disease-causing microorganism 病気を引き起こす微生物
made from weakened or killed forms of the microbe or its toxins
毒性を弱めるかあるいは無くした病原体から作られる。
急に気温が下がって着込んでも寒いなぁ。
