Immunization aims to prevent the occurrence of a disease by introducing a weakened or inactivated form of the pathogen into the body, allowing the immune system to develop protection against it without causing the actual disease.

Toxoid vaccines are not a type of vaccine. They are modified versions of bacterial toxins that have been rendered harmless while retaining their ability to stimulate an immune response.

Active immunization involves the introduction of a weakened or inactivated pathogen, while passive immunization involves the introduction of antibodies. Active immunization provides long-term protection, while passive immunization provides short-term protection. Active immunization is typically administered through vaccination, while passive immunization is typically administered through injection of antibodies.

The common cold is caused by a variety of viruses, and there is no single vaccine that can prevent all types of the common cold.

The MMR vaccine is typically recommended at 12 months of age, with a second dose at 4-6 years of age.

Fever, headache, and muscle aches are all potential side effects of the flu vaccine. These side effects are typically mild and go away within a few days.

The HPV vaccine is recommended for both boys and girls at 9-12 years of age, with a second dose at 13-15 years of age.

Immunization does not eliminate the need for medical treatment. While it can prevent or reduce the severity of disease, it does not guarantee that a person will never need medical treatment for a particular disease.

The herd immunity threshold is the percentage of a population that needs to be vaccinated to achieve herd immunity, which is the point at which the spread of a disease is stopped because there are not enough susceptible individuals to maintain transmission.

Influenza is not a recommended childhood vaccine. It is recommended for certain high-risk groups, such as young children, the elderly, and people with chronic health conditions.

The chickenpox vaccine is recommended at 12 months of age, with a second dose at 4-6 years of age.

Fever, rash, and swelling of the lymph nodes are all potential side effects of the MMR vaccine. These side effects are typically mild and go away within a few days.

The hepatitis B vaccine is recommended at birth, with a second dose at 1-2 months of age and a third dose at 6-18 months of age.

Community herd immunity is not a type of herd immunity. It is a term used to describe the level of herd immunity in a specific community.

The rotavirus vaccine is recommended at 2 months of age, with a second dose at 4 months of age and a third dose at 6 months of age.