The bivalent COVID-19 vaccine is designed to protect against two different strains of the virus, specifically the original strain and the Omicron variant. This dual-target approach aims to enhance immunity and provide broader protection, especially as new variants emerge. These vaccines work by stimulating the immune system to recognize and fight off the virus more effectively. They are part of ongoing efforts by health organizations to adapt vaccination strategies in response to the evolving nature of the SARS-CoV-2 virus, ensuring better protection for the population.