# Microbes, Diseases, and Prevention | Viruses & Bacteria
> Learn about diseases caused by viruses, bacteria, and protozoans. Explore essential principles of treatment, prevention, and the success of vaccines like Polio.

Tags: microbiology, disease-prevention, vaccination, health-education, viruses, bacteria, public-health, polio-eradication
## Diseases Caused by Microbes
* Overview of viruses, bacteria, and protozoans.
* Prevention and treatment strategies for microbial infections.

## What are Microbes?
* Definition: Microorganisms too small to see with the naked eye.
* Three main categories: Viruses (smallest, live in cells), Bacteria (single-celled), and Protozoans (single-celled in water).

## Diseases Caused by Viruses
* Examples: Polio, Dengue, Measles, Common Cold, COVID-19.
* Spread: Via air, water, insect vectors (mosquitoes), or direct contact.
* Prevention: Vaccination and avoiding contact with infected people.

## Diseases Caused by Bacteria
* Examples: Tuberculosis (TB), Cholera, and Typhoid.
* Transmission: Contaminated food, water, or inhaling droplets.
* Note: Not all bacteria are harmful; some are beneficial (e.g., in yogurt).

## Diseases Caused by Protozoans
* Examples: Malaria (spread by female Anopheles mosquito) and Amoebic Dysentery (spread via contaminated food/water).
* Focus: Clean water and mosquito control are primary defenses.

## Principles of Treatment
* Killing Microbes: Using antibiotics (bacteria only) or antivirals.
* Symptom Management: Reducing fever and pain.
* Protocol: Always consult a doctor and finish the full course of medicine.

## Success of Prevention: Polio Decline
* Statistics: Wild polio cases dropped from 350,000 in 1988 to nearly zero by 2022 due to global vaccination efforts.

## Principles of Prevention
* Hygiene: Washing hands and personal cleanliness.
* Safety: Drinking boiled/filtered water and covering food.
* Vector Control: Using mosquito nets and repellents.
* Immunization: Taking vaccines for Polio, Measles, and Hepatitis.

## Pulse Polio Programme
* Initiative: Eradicating polio using Oral Polio Vaccine (OPV) for children under 5.
* Motto: "Dos Boond Zindagi Ki" (Two drops for life).

## Conclusion
* Prevention is better than cure through healthy habits and hygiene.
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