Emerging viruses can spread through various mechanisms: - Zoonotic Transmission: Many emerging viruses originate in _animals_ and are transmitted to humans, as seen in the cases of Ebola and SARS-CoV-2. - Human-to-Human Transmission: Once a virus enters the human population, it can spread through respiratory droplets, bodily fluids, or other _contact_ methods. - Global Travel: Modern travel facilitates the rapid spread of viruses across continents, leading to _global outbreaks_.
