AQA · GCSE · Combined Science

    Course version: 8464 · Version from Sept 2018

    Viral diseases: Measles is a viral disease showing symptoms of fever and a red skin rash. Measles is a serious illness that can be fatal if complications arise. For this reason most young children are vaccinated against measles. The measles virus is spread by inhalation of droplets from sneezes and coughs.

    Measles is caused by a virus and is highly contagious.

      Study notes

      From the checked teaching notes for this specification point.

      The idea

      Measles is caused by a virus and is highly contagious. After a person inhales droplets released by an infected person's sneeze or cough, the virus multiplies in the airways and spreads through the body. Early symptoms include fever and a red skin rash; the rash often appears a few days after the fever begins. Most people recover, but complications such as pneumonia or encephalitis can occur, and measles can be fatal. Because measles spreads easily through the air, vaccination of young children protects individuals and reduces transmission in the population. The MMR vaccine contains weakened measles virus and stimulates immunity without causing the disease.

      What earns the marks

      • Measles is caused by a virus, not by bacteria or fungi.
      • Symptoms include fever and a red skin rash.
      • Transmission occurs by inhalation of droplets from sneezes and coughs.
      • Measles can be serious and may be fatal if complications such as pneumonia or encephalitis develop.
      • Most young children are vaccinated against measles to prevent infection and reduce spread.
      • Vaccination protects the individual and can reduce transmission within the population.

      Common mistakes and how to put them right

      • Describing measles as a bacterial disease.

        Put it right by naming the measles virus as the pathogen.

      • Saying the rash is the only symptom.

        Put it right by including fever and noting that complications can occur.

      • Confusing droplet inhalation with direct skin contact.

        Put it right by stating the virus is breathed in from airborne droplets.

      Exam tips

      • Name both symptoms and the transmission route when describing how measles spreads.
      • Use the word 'droplets' and link them to sneezes or coughs to show the method of inhalation.
      • When explaining vaccination, refer to protecting young children and reducing the chance of an outbreak.

      Try the lesson

      The start of the Viral diseases: Measles is a viral disease showing symptoms of fever and a red skin rash. Measles is a serious illness that can be fatal if complications arise. For this reason most young children are vaccinated against measles. The measles virus is spread by inhalation of droplets from sneezes and coughs. lesson, made from checked teaching notes for this specification point.

      Have a go first

      Which two symptoms are typical of measles?

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      Test your understanding of Viral diseases: Measles is a viral disease showing symptoms of fever and a red skin rash. Measles is a serious illness that can be fatal if complications arise. For this reason most young children are vaccinated against measles. The measles virus is spread by inhalation of droplets from sneezes and coughs.

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