रोगों के ऊर्ध्वाधर संचरण (vertical transmission) का तात्पर्य निम्नलिखित में से किसके माध्यम से होने वाले संचरण से है?

The epidemiological triad consists of which three components?

The time period from infection/disease initiation until the infected individual becomes infectious or detectable by diagnostic testing is termed the:

Case fatality rate in epidemiology is defined as the proportion of deaths among diagnosed cases of a particular disease during a specific period, indicating: