A. MMR vaccine is given around the age of 1 and again around 4 years as part of the routine childhood immunization schedule, not for infants.

B. Influenza vaccine is recommended annually for children older than 6 months, but it's not part of the routine childhood immunization schedule for infants.

C. Hepatitis A vaccine is given in two doses at least six months apart, starting at age 1. It is not part of the routine infant immunization schedule.

D. DTaP vaccine (Diphtheria, Tetanus, Pertussis) is part of the routine childhood immunization schedule and is given to infants at 2, 4, and 6 months of age.

A. Polio vaccine is part of the routine childhood immunization schedule and is given to infants and children, not specifically for adolescents.

B. HPV (Human Papillomavirus) vaccine is recommended for adolescents to prevent certain types of cancer, including cervical cancer and some types of throat and mouth cancers.

C. Hib (Haemophilus influenzae type b) vaccine is part of the routine childhood immunization schedule and is given to infants and children.

D. Hepatitis B vaccine is given to infants at birth and throughout childhood. It is not specifically given to adolescents to prevent cancer.

A. Chickenpox (Varicella) can cause discomfort and skin rash but is not typically associated with severe complications like pneumonia and encephalitis.

B. Measles can lead to severe complications such as pneumonia and encephalitis, especially in unvaccinated individuals.

C. Tetanus can cause muscle stiffness and spasms but is not directly associated with complications like pneumonia and encephalitis.

D. Hepatitis B primarily affects the liver and does not commonly cause pneumonia or encephalitis.

A. 2 months is the age at which the first doses of vaccines like DTaP, Hib, and polio are given, not MMR.

B. 6 months is the age at which additional doses of vaccines like DTaP and influenza might be given, but not the first dose of MMR.

C. The first dose of the MMR (Measles, Mumps, Rubella) vaccine is recommended at 12 months of age.

D. 18 months is typically a time for booster doses of certain vaccines, not the first dose of MMR.

A. MMR vaccine protects against measles, mumps, and rubella, not bacterial meningitis.

B. DTaP vaccine protects against diphtheria, tetanus, and pertussis, not bacterial meningitis.

C. Hib vaccine (Haemophilus influenzae type b) is given to protect against bacterial meningitis, pneumonia, and other severe infections caused by Haemophilus influenzae type b bacteria.

D. Hepatitis A vaccine protects against hepatitis A virus, not bacterial meningitis.

A. Influenza vaccine protects against the flu, not hepatitis A.

B. Hepatitis B vaccine protects against hepatitis B virus, not hepatitis A.

C. MMR vaccine protects against measles, mumps, and rubella, not hepatitis A.

D. Hepatitis A vaccine is recommended for travelers visiting regions where hepatitis A is common to prevent infection with the hepatitis A virus.

A. Influenza vaccine protects against the flu, which can cause respiratory infections, but it is not specific to infants and young children.

B. Hepatitis B vaccine protects against hepatitis B virus

, not respiratory infections.

C. Hib vaccine (Haemophilus influenzae type b) is given to protect against severe respiratory infections caused by Haemophilus influenzae type b bacteria, especially in infants and young children.

D. Polio vaccine protects against polio, a disease that affects the nervous system, not specific to respiratory infections.

A. MMR vaccine protects against measles, mumps, and rubella, but none of these diseases cause paralysis.

B. Varicella (Chickenpox) vaccine protects against chickenpox, which is not known for causing paralysis.

C. Hepatitis B vaccine protects against hepatitis B virus, which primarily affects the liver and does not cause paralysis.

D. Polio vaccine prevents polio, a highly contagious disease caused by poliovirus. Polio can cause paralysis, making the vaccine crucial in preventing this complication.

A. Hepatitis A vaccine is given to protect against hepatitis A virus, which can cause severe liver damage and is transmitted through contaminated food and water.

B. Rotavirus vaccine protects against rotavirus infection, which causes severe diarrhea and dehydration, not liver damage.

C. MMR vaccine protects against measles, mumps, and rubella, not liver damage.

D. DTaP vaccine protects against diphtheria, tetanus, and pertussis, not liver damage.

A. Influenza vaccine is recommended annually for all adults, especially those at higher risk, but it does not specifically prevent pneumonia and bloodstream infections caused by bacteria.

B. Pneumococcal vaccine is recommended for adults aged 65 and older to prevent complications such as pneumonia and bloodstream infections caused by Streptococcus pneumoniae bacteria.

C. Hepatitis B vaccine is not specifically recommended for all adults aged 65 and older.

D. MMR vaccine is given to children and individuals who have not been previously vaccinated, not specifically for adults aged 65 and older.