Tag: immunity

• A vaccine is a biological preparation that provides active acquired immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe. The agent stimulates the body's immune system to recognize the agent as a threat, destroy it, and to further recognize and destroy any of the microorganisms associated with that agent that it may encounter in the future.
  
• The terms vaccine and vaccination are derived from smallpox of a cow were introduced by Edward Jenner.
  

The polio vaccine was developed in 1955 by Dr. Jonas Salk and thus called the “Salk vaccine”. It is the inactivated or killed vaccine that was given by intramuscular injection but now it is given orally. The inactivated polio vaccine produces antibodies in the blood to all three types of poliovirus. In the event of infection, these antibodies prevent the spread of the virus to the central nervous system and protect against paralysis. 

• Smallpox vaccine, the first successful vaccine to be developed, was introduced by Edward Jenner in 1796. 
• He followed up his observation that milkmaids who had previously caught cowpox did not later catch smallpox by showing that inoculated cowpox protected against inoculated smallpox. 
• Hence, The first vaccine produced by Edward Jenner was for protection against Smallpox  
• So, the correct answer is 'Smallpox'.

Variolation was an early method of inoculation where material from a smallpox patient was introduced into a healthy person to induce immunity before the development of modern vaccines.

The polio vaccine was developed in 1955 by Dr. Jonas Salk and thus called the “Salk vaccine”. It is the inactivated or killed vaccine that was given by intramuscular injection but now it is given orally.

Variolation practices originated in the East (specifically China and India) long before they were introduced to the West.

• Rabies is a viral disease caused by the rabies virus that causes inflammation of the brain in humans and other mammals. Early symptoms can include fever and tingling at the site of exposure.
• Virtually all infections with rabies resulted in death until two French scientists, Louis Pasteur and Émile Roux, developed the first rabies vaccination in 1885.
• Hence vaccine against rabies was first developed by Pasteur.
• So, the correct answer is 'Pasteur'.

Explanation: Pulse Polio Immunization is a program initiated by the Government of India, where children between the ages of 0 to 5 years are administered oral polio vaccine twice a year to interrupt transmission of polio.

Kupffer cells are specialized macrophages located in the liver that play a key role in the immune system by phagocytosing pathogens and debris.

Phagocytes have the ability to phagocytose or kill foreign cells and particles like pathogens by ingesting them. Many blood cells have this function, including monocytes, neutrophils and macrophages. Basophils do not have phagocytic activity.

Thus, the correct answer is 'Basophil.'