First Ebola Case is Diagnosed in the U.S., CDC Reports

[uppityperson]

89. Do you not believe in an incubation period? Do you believe it strikes instantly, that viruses

do not take time to grow in a body enoughh for the body to expell them, become contagious?

Here is how it works, with exposure to a virus, whether head cold, flu, measles, ebola.
1. Exposure
2. Virus find the spot it likes to grow in the body, depends on temperature, humidity. Starts to multiply.
3. Body develops antibodies and other symptoms to fight it off. Body develops symptoms based on what damage was caused.
Symptoms develop like temperature (most viruss can only love in a narrow temp range, get too hot and they die), sneeze/cough (cold viruses take up residence in respiratory tract), blood clots/tissue dying (ebola), skin rash (measles). You are now contagious and symptomatic.

There are some viruses in which you are contagious, shedding live viruses, before symptoms show. Ebola is not one of those, fortunately.

But it takes a bit of time for the virus to multiply enough for the infected person to become contagious. If you plant a seed, do you harvest the crop immediately? Same thing with viruses.