1:IMMUNOLOGICAL MECHANISMS
What is an antigen?
A harmless component of a pathogen introduced by vaccines to stimulate immune recognition.
What is seven to twelve days?
The approximate time required for the immune system to defend the body during first exposure to a pathogen.
What is to increase the probability of developing immunity?
The reason routine vaccines are administered in multiple doses.
What is smallpox?
The disease declared eradicated following a global immunization campaign between 1967 and 1977.
What is prevention is preferable to treatment?
The central public-health principle underlying mass immunization programs.
What are B-lymphocytes?
The specific white blood cells responsible for synthesizing proteins that bind to antigens.
What is severe illness or death?
The major risk associated with the immune system’s delayed response during an initial infection
What is minor in comparison?
The general severity of vaccine side effects compared to the diseases they prevent.
What is the World Health Organization?
The international organization that coordinated the eradication of smallpox
What is reduced strain on healthcare systems?
One systemic benefit of immunization beyond individual protection.
What are antibodies?
The molecular structures produced in large quantities to neutralize invading pathogens.
✅ What is prior immune memory?
The reason antibodies are produced more rapidly during subsequent infection
What is approximately one in one hundred thousand doses?
The statistical likelihood of a severe allergic reaction to the measles vaccine.
What is the Global Polio Eradication Initiative?
The global initiative launched in 1988 to eliminate poliomyelitis.
What is Kenya?
The country where a large-scale measles vaccination campaign took place in 2002.
What is a toxin?
A bacterial poison rendered inactive in vaccines to provoke a protective immune response.
What is blocking pathogen activity and facilitating immune destruction?
The dual role antibodies play once they bind to their target antigen.
What is vaccine-associated paralytic polio?
A rare neurological complication historically associated with oral polio vaccines.
What is 99 percent?
The percentage reduction in polio infections since the initiative began.
What is a net saving of 12 million US dollars?
The estimated long-term financial outcome of that campaign.
What is immunological memory?
The immunological process that allows the body to mount a faster response upon re-exposure to a pathogen.
What is protection without exposure to disease?
The fundamental advantage vaccination provides over natural infection.
What is that serious complications are extremely rare?
The conclusion drawn in the text regarding the overall safety of vaccines.
What is measles?
The disease whose mortality rate declined by nearly 40 percent between 1999 and 2003
What is it saves lives with minimal cost and lifestyle disruption?
The primary reason immunization is regarded as one of the most cost-effective health investments