Which virus is spread through droplet nuclei?

The measles virus is indeed spread through droplet nuclei, making it highly contagious. Droplet nuclei are tiny respiratory droplets that remain suspended in the air after an infected person coughs or sneezes. These droplets can travel long distances, allowing the virus to infect individuals who are not in close proximity to the infected person. This airborne transmission is a key reason why measles can spread rapidly in communities, particularly among those who are unvaccinated or have weakened immune systems.

In contrast, HIV and Hepatitis B are primarily transmitted through direct blood-to-blood contact, sexual contact, or from mother to child during birth or breastfeeding, rather than through respiratory droplets. Clostridium difficile, often related to antibiotic use and not typically an airborne pathogen, is primarily spread via fecal-oral transmission, particularly in healthcare settings. Understanding these modes of transmission helps in developing effective infection control strategies, particularly for diseases like measles that can spread so easily in crowded or unvaccinated environments.