Vaccine

Vaccines are biological preparations designed to provide immunity against infectious diseases. They work by stimulating the body's immune system to recognize and fight pathogens such as viruses or bacteria. Over the years, vaccines have been instrumental in combating and eradicating diseases like smallpox, polio, and measles, significantly reducing global morbidity and mortality rates. Vaccination campaigns are often driven by governments, health organizations, and initiatives such as the World Health Organization (WHO) and Gavi, the Vaccine Alliance.

During the COVID-19 pandemic, vaccines became a focal point of global health efforts. The rapid development and deployment of vaccines like Pfizer-BioNTech, Moderna, Covaxin, and Covishield marked a crucial step toward controlling the virus. These vaccines were developed using different technologies, including mRNA and viral vector platforms, showcasing scientific advancements and international collaboration. However, vaccine distribution has faced challenges related to accessibility, affordability, and misinformation, which has hindered global vaccination efforts.