The “a” in DTaP is for acellular because the pertussis portion of the shot is not a weakened or dead whole cell derived vaccine.
Whooping cough kills infants at a much higher rate than older children and adults, which is why we vax infants and not adults. Very young infants are highly likely to end up in PICU in 1st world countries, in 3rd world countries they die.
Hep A in infants and young children is generally asymptomatic which means they become super spreaders in daycare and may give it to Granny whom it is more likely to kill.
Rotavirus shots are about preventing daycare outbreaks and reducing infant hospitalizations.
Pneumonia shots are a very good idea, especially if you are an old toot with other chronic illnesses. In the young it does prevent secondary infections following other respiratory diseases and generally reduces childhood hospitalizations. The shots are cheap insurance.
All these vaccines actually prevent the recipient from getting and transmitting the diseases unlike the useless C19 vax which completely fails by having a negative cost/benefit ratio.
Ah, a proponent of forcible vaccinations, got it.
Did you know humans develop permanent immunity as time goes by. Most people are immune and passed it to their kids and grands, for most communicable diseases. What moms are immune to is passed to the children. It is why humans are still on Earth. Those who aren’t naturally immune die off and leave the strong ones. With vaccinations we are building humans with no natural immunity, so the theory goes.
Like with Polio, it died out because people survived and became immune. The rates of polio deaths dropped before the vaccines, the same happened with measles.