 Steps involved in the transfer of pathogens to new hosts include contact between the pathogen and the host , the successful infection of an initial individual host leading to amplification and an outbreak , and the generation within the original or new host of variants that have the ability to spread efficiently between individuals in populations of the new host.
<fluency>  Steps involved in the transfer of pathogens to new hosts include contact between the pathogen and the host , the successful infection of an initial individual host leading to amplification and an outbreak , and the generation within the original or new host of variants that have the ability to spread efficiently between individuals in populations of the new host.
 Steps involved in the transfer of pathogens to new hosts include contact between the pathogen and the host ; the successful infection of an initial individual host leading to amplification and an outbreak , and the generation within the original or new host of variants that have the ability to spread efficiently between individuals in populations of the new host.