I'm glad you've at least considered to ask about it. But please consider the risks of having whopping cough or flu as a baby, or if you continue this unfortunate train of thought by refusing MMR and other vaccines, that your baby is more likely to die from not being vaccinated, than being vaccinated.
Anti-vaccination is unfortunately becoming more prevalent. So the number of people not immune to things like measles, or similar are going up which puts your child at even greater risk of catching a serious disease which years ago would be minimal.
Do you really think that years ago before had vaccinations we were better off because we went injecting ourselves with "poisons"? Back in the day when child mortality was a lot higher. When polio meant living in an iron lung? Is that what you'd want for a child, to go back to that?
When children really were dying from whooping cough, and it was more common?
If you don't vaccinate and everyone else around you doesn't you increase the risk.
Trouble is nowadays we don't hear about things like measles and whooping cough so we think the risk isn't there. They have healthy children, it validates their choice. But they're just piggybacking of the fact that for years people have had vaccines and the disease isn't as prevalent.
As vaccine rates go down though the chance of getting sick will increase and your child won't be protected.
And in today's world by doing this you are willingly putting your child at risk of death. Kinda like walking out in the road without looking to see if a car is coming. Maybe that road isn't very much used and you only get 1 car a week. But soon it might be more populated and the risk greater. I