Communicable diseases are illnesses that can spread from person to... Show more
Biology14 views·Updated May 8, 2026·3 pagesUnderstanding Communicable Diseases for AQA Science
Hena@hshakoor4
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Viral Infections: HIV and Tobacco Mosaic Virus
HIV is a serious virus that initially causes flu-like symptoms but can develop into AIDS if left untreated. You can prevent HIV by using condoms during sexual contact and never sharing needles. The virus spreads through sexual contact and sharing contaminated needles, making safe practices absolutely essential.
Antiretroviral drugs can help manage HIV, but prevention remains the best strategy. These medications help people with HIV live healthier lives by controlling the virus in their body.
Tobacco mosaic virus affects plants, creating a distinctive mosaic pattern on leaves that reduces photosynthesis and slows plant growth. Farmers prevent this by using crop rotation, virus-free seeds, and controlling insects that spread the disease.
Key Insight: Both human and plant viruses can be prevented through smart practices - safe behaviour for humans, and proper farming techniques for plants.
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of 3
Vector-Borne and Respiratory Diseases: Malaria and Measles
Malaria causes repeating episodes of fever, chills, headaches, and vomiting. Mosquitoes act as vectors, meaning they carry the disease from person to person. You can protect yourself with insect repellent, mosquito nets, and antimalarial drugs when travelling to affected areas.
Measles starts with cold-like symptoms but progresses to sore, red eyes, high temperature, and small greyish-white spots inside your cheeks. It spreads through respiratory droplets when infected people cough or sneeze.
Prevention is straightforward: get vaccinated, wash your hands regularly, and cover your nose and mouth when sneezing or coughing. Vaccination is particularly important as it provides long-lasting protection.
Remember: Mosquitoes don't just bite - they can carry serious diseases, so always use protection in areas where malaria is common.
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of 3
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Biology14 views·Updated May 8, 2026·3 pagesUnderstanding Communicable Diseases for AQA Science
Hena@hshakoor4
Communicable diseases are illnesses that can spread from person to person or through other means like insects, contaminated food, or infected plants. Understanding how these diseases spread and how to prevent them is crucial for protecting your health and the... Show more
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Viral Infections: HIV and Tobacco Mosaic Virus
HIV is a serious virus that initially causes flu-like symptoms but can develop into AIDS if left untreated. You can prevent HIV by using condoms during sexual contact and never sharing needles. The virus spreads through sexual contact and sharing contaminated needles, making safe practices absolutely essential.
Antiretroviral drugs can help manage HIV, but prevention remains the best strategy. These medications help people with HIV live healthier lives by controlling the virus in their body.
Tobacco mosaic virus affects plants, creating a distinctive mosaic pattern on leaves that reduces photosynthesis and slows plant growth. Farmers prevent this by using crop rotation, virus-free seeds, and controlling insects that spread the disease.
Key Insight: Both human and plant viruses can be prevented through smart practices - safe behaviour for humans, and proper farming techniques for plants.
2
of 3Sign up to see the content. It's free!
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Vector-Borne and Respiratory Diseases: Malaria and Measles
Malaria causes repeating episodes of fever, chills, headaches, and vomiting. Mosquitoes act as vectors, meaning they carry the disease from person to person. You can protect yourself with insect repellent, mosquito nets, and antimalarial drugs when travelling to affected areas.
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