Africa is the second-largest continent on Earth, covering about 30.

Amino acids are organic compounds that serve as the building blocks of proteins and play crucial roles in various biological processes.

Anaphylaxis is a severe and potentially life-threatening allergic reaction that occurs rapidly and affects multiple body systems.

An antibody, also known as an immunoglobulin, is a large Y-shaped protein produced by the immune system to neutralize pathogens such as bacteria and viruses.

Cell-based vaccines are developed from mammalian or more rarely avian or insect cell lines rather than the more common method which uses the cells in embryonic chicken eggs to develop the antigens.

Cellular immunity, also known as cell-mediated immunity, is an immune response that does not rely on the production of antibodies.

The Centers for Disease Control and Prevention (CDC) is a national public health agency in the United States.

Clinical trials are prospective biomedical or behavioral research studies on human participants designed to answer specific questions about biomedical or behavioral interventions, including new treatments (such as novel vaccines, drugs, dietary choices, dietary supplements, and medical devices) and known interventions that warrant further study and comparison.