Which of the following are considered a form of passive immunity?SELECT ALL THAT APPLYRecovery following a symptomatic infectionPassage of antibodies from a mother to the newborn through colostrumApplication of antitoxin to treat botulismVaccination with a tetanus toxoid vaccineAdministration of antibiotics to treat diphtheriaUse of antiviral medications to treat influenza

Passive immunity refers to the transfer of active humoral immunity in the form of ready-made antibodies. It can occur naturally or artificially.

1. Recovery following a symptomatic infection: This is not a form of passive immunity. It's an example of active immunity because the body produces its own antibodies to fight off the infection.

2. Passage of antibodies from a mother to the newborn through colostrum: This is a form of passive immunity. The mother's antibodies are passed to the child, providing temporary protection.

3. Application of antitoxin to treat botulism: This is a form of passive immunity. Antitoxins are antibodies given to a person to help neutralize toxins.

4. Vaccination with a tetanus toxoid vaccine: This is not a form of passive immunity. It's an example of active immunity because the vaccine stimulates the body to produce its own antibodies.

5. Administration of antibiotics to treat diphtheria: This is not a form of passive immunity. Antibiotics kill bacteria directly and do not involve the immune system's antibody production.

6. Use of antiviral medications to treat influenza: This is not a form of passive immunity. Antiviral medications work by stopping the virus from multiplying, they do not involve the immune system's antibody production.

So, the forms of passive immunity in your list are:

• Passage of antibodies from a mother to the newborn through colostrum
• Application of antitoxin to treat botulism