What is "silent transmission" most notably responsible for during COVID-19 outbreaks?

Silent transmission refers to the spread of a virus by individuals who are infected but do not exhibit any noticeable symptoms. In the context of COVID-19 outbreaks, this type of transmission is particularly significant as it allows the virus to spread undetected within communities. Research indicates that silent, or asymptomatic, carriers can account for over 50% of infections, facilitating rapid propagation of the virus before individuals are aware they are infected.

This phenomenon complicates efforts to control the outbreak, as many infected individuals may not seek testing or quarantine, leading to a larger pool of cases that can transmit the virus to others. Recognizing the role of silent transmission has been crucial for public health strategies, as it underscores the importance of widespread testing, contact tracing, and the use of preventative measures, even among those who feel well.