Answer:
B
Step-by-step explanation:
The correct answer is B. mRNA vaccines are an important technology for building herd immunity because they increase the number and availability of vaccines. mRNA vaccines have several advantages over traditional vaccines, such as:
Speed of development: mRNA vaccines can be developed more quickly than traditional vaccines because they do not require the time-consuming process of growing large quantities of a weakened or inactivated virus.
Flexibility: mRNA vaccines can be designed and modified quickly to address new and emerging strains of viruses, such as the COVID-19 variant strains.
Safety: mRNA vaccines do not contain live virus, which makes them safer for certain populations, such as people with weakened immune systems.
Efficacy: mRNA vaccines have been shown to be highly effective in preventing infection and reducing the severity of disease.
By increasing the number and availability of vaccines, mRNA vaccines can help to accelerate the process of building herd immunity, which occurs when a sufficient percentage of the population becomes immune to a virus, making it difficult for the virus to spread. This can help to protect vulnerable individuals who may not be able to receive the vaccine due to medical reasons or who may not develop a strong immune response to the vaccine.