Different Rate of Infection
Every virus or infection will hit you in different ways, The cold usually comes with some signals before it worsens. On the other hand, the flu is infamous for striking when you least expect it. You might have no symptoms right up to the moment when all of them hit you at once, but most of the time, you’ll start with a low-grade fever or sore throat and disregard it.
The speed of infection of pneumonia depends on the type and how it was contracted. Bacterial pneumonia often happens suddenly, while the viral kind come on gradually.
