Which type of vaccine is made from live pathogens that have been attenuated?

Which type of vaccine is made from live pathogens that have been attenuated?

• A. Inactivated vaccines
• B. Subunit vaccines
• C. Live attenuated vaccines
• D. Toxoid vaccines

Answer: (C)

Live attenuated vaccines are specifically designed using pathogens that have been modified to reduce their virulence, which means they are less likely to cause disease in healthy individuals. By using live organisms that can still replicate, these vaccines stimulate a robust and long-lasting immune response. This response closely mimics what the body would produce if it were exposed to the actual disease-causing organism, allowing for better immunity and memory against that pathogen. In contrast, inactivated vaccines contain pathogens that have been killed or inactivated, meaning they cannot replicate. Subunit vaccines include only specific parts of the pathogen rather than the whole organism, which may offer less comprehensive immunity. Toxoid vaccines are derived from toxins produced by pathogens that have been inactivated; these are aimed at neutralizing the effects of toxins rather than addressing the infectious agent directly. Thus, live attenuated vaccines stand out as they evoke a stronger and potentially longer-lasting immune response due to the use of live but weakened pathogens.

Live attenuated vaccines are specifically designed using pathogens that have been modified to reduce their virulence, which means they are less likely to cause disease in healthy individuals. By using live organisms that can still replicate, these vaccines stimulate a robust and long-lasting immune response. This response closely mimics what the body would produce if it were exposed to the actual disease-causing organism, allowing for better immunity and memory against that pathogen.

In contrast, inactivated vaccines contain pathogens that have been killed or inactivated, meaning they cannot replicate. Subunit vaccines include only specific parts of the pathogen rather than the whole organism, which may offer less comprehensive immunity. Toxoid vaccines are derived from toxins produced by pathogens that have been inactivated; these are aimed at neutralizing the effects of toxins rather than addressing the infectious agent directly. Thus, live attenuated vaccines stand out as they evoke a stronger and potentially longer-lasting immune response due to the use of live but weakened pathogens.