infectious disease

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What is an infectious disease?

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An infectious disease is a disorder caused by organisms such as bacteria, viruses, fungi, or parasites that can be transmitted from one person to another.

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What are the common modes of transmission for infectious diseases?

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Infectious diseases can be transmitted through direct contact, airborne transmission, vector-borne transmission, and contaminated surfaces.

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What is the difference between a vector and a host in the context of infectious diseases?

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A vector is an organism that transmits pathogens from one host to another, while a host is an organism that harbors the pathogen.

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What is the role of the immune system in fighting infectious diseases?

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The immune system protects the body by identifying and destroying pathogens through various mechanisms, including the production of antibodies.

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What is a vaccine?

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A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease.

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What is antibiotic resistance?

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Antibiotic resistance occurs when bacteria evolve and become resistant to the effects of medications that once killed them or inhibited their growth.

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What are the symptoms of a viral infection?

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Common symptoms of a viral infection include fever, fatigue, cough, sore throat, and body aches.

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What is the difference between a pandemic and an epidemic?

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An epidemic is a sudden increase in the number of cases of a disease above what is normally expected in a specific area, while a pandemic is an epidemic that has spread over multiple countries or continents.

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What is herd immunity?

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Herd immunity occurs when a large percentage of a population becomes immune to a disease, making its spread unlikely.

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What are zoonotic diseases?

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Zoonotic diseases are infectious diseases that are transmitted from animals to humans.