welcome to the forum bigragu (figured id say this) and thank you for not jumping the gun and calling us nuts lol but now you know why we “plan” for zombies (i think with the rout the world goes in medical experimentation something close to a “zombpocolypse” will happen) but its just a thought.

now to the topic at hand, either if they were slow/fast zombies you have to think about where majority of people live, in the cities. now take the 500,000 people living in close quarters or in a confined area, now add one zombie to the mix. that one zombie infects one or two, those infect four or eight, so on, so on. the fact that people live in close proximity to one another will cause the pandemic to spread like wild fire, then mass histeria strikes, people will panic trying to escape causing even more infections/death to the mix, after like projected above, a week the entire civilian infenstructer will collapse due to “one initial zombie” bite, whether slow or fast an entire city just got quarintined (SP) now we all know we love government responses, with media blackouts, cover ups etc etc. they will try to block of the city or try to run clean and sweeps of the city, but because the governments fashionable late arrival the 10-100 infected people (who were bit or wounded but didnt reanimate yet) has already escaped allowing the whole thing to start over, all because one slow/fast zombie.

i will say the fast zombies will cause the infection to spread faster maybe even cutting the time frame down to several days, but the fact is that one zombie caused the pandemic to spread, the fault of this isnt because poor joe smoe didnt kill the zombie when he confronted it, but because majority of people chose to move in more confined area that houses thousands of others, if people lived further apart the infection would move slower and i would say depending how far the people are from one another would probably cause the infection to take hold over a series of months. so in the end if you think about this, our own human nature that drives us to be social (living with close proximity to each other) will be the cause of the pandemic and even our doom :)