Let's say we did the Lab exercise on the subject of epidemiology. It is a handshaking exercise with one patient zero (who has a pathogen in his/her hand). In the first round, around 35% of the population caught the infection and tested positive. In the second round, the entire population (100%) got infected and tested positive. In the first round, some positive patients had a growth of the pathogen around 90%, but later in the second round, they had a growth of 70%. Meanwhile, some patients had pathogenic growth around 34%, but later in the second round, they had a growth of up to 100%. So my question is based on the given data above: in which group is it most likely to have the Patient zero? The ones whose growth increased over time or the other one? And explain why?