Deadly pandemics have claimed lives around the world for hundreds of years with the most recent influenza pandemic being?

the H1N1 influenza pandemic, also known as the Swine Flu, which emerged in 2009. This pandemic spread rapidly across the globe, leading to an estimated 151,700 to 575,400 deaths in its first year. It highlighted the importance of global health surveillance and vaccination efforts. Since then, the COVID-19 pandemic has further underscored the ongoing threat posed by Infectious Diseases.