Infectious diseases and drug resistance - Notes
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- Infectious diseases cause about a quarter to a third of all deaths worldwide and more than half of those under five.
- Key infectious agents include SARS-CoV-2, HIV/AIDS, malaria, tuberculosis, lower respiratory infections, and diarrheal diseases.
- Diseases are classified by duration (acute, chronic, latent), location (local, systemic), and timing (primary, secondary).
- The majority of microorganisms are not pathogenic; symbiotic relationships like mutualism, commensalism, and parasitism are common.
- Viruses make up almost 70% of the genetic information in humans, with bacteria contributing about 10%, highlighting their significant role in human health.
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