What type of immunity might a child experience if she recovers from a viral infection?

When a child recovers from a viral infection, she develops natural immunity. This type of immunity occurs as the body's immune system responds to the actual infection by producing antibodies specific to the virus. After the infection, these antibodies remain in the body, allowing for a quicker and stronger immune response if the same virus attempts to invade again in the future.

Natural immunity can occur through the process of disease exposure, resulting in both humoral (antibody-mediated) and cell-mediated immune responses. This is different from passive immunity, where antibodies are transferred from one individual to another (such as from mother to child through breast milk), or artificial immunity, which involves vaccination where antigens are introduced to stimulate an immune response without causing the disease. Dual immunity is not a recognized term in immunology. Therefore, the correct answer reflects the natural process of developing immunity through recovery from an infectious disease.