False.
During the 1918 influenza pandemic, medicine and traditional public health measures had limited success in preventing the spread of the virus or significantly improving survivorship. The 1918 pandemic was caused by the H1N1 influenza virus, and at that time, there were no vaccines or effective antiviral medications available to prevent or treat the illness.
Traditional public health measures, such as isolation and quarantine, were implemented in various places, but they often had limited impact due to the rapid and highly contagious nature of the virus. The pandemic eventually subsided as those who were infected either developed immunity or succumbed to the virus.
It wasn't until decades later, with advancements in medical research and the development of vaccines and antiviral medications, that we gained better tools for preventing and treating influenza and other infectious diseases.