Thank you for the stimulating conversation. The relationship between naturally acquired disease, recovery and future health is never discussed clearly. Instead of giving Africans vaccines, why don't we give them control of their resources and allow them to provide proper sanitation and nutrition to their people?

Can I check, you believe it is ethical to medically intervene in the life of a healthy child with a procedure that has potentially grave risks for the sake of another child?

What if the first child gets brain damaged by the vaccine and the second child catches a different pathogen and dies anyway? Is that moral?

At best, science presents working assumptions based on repeated observations. At worst it is use as propaganda in order to manipulate and control people.....often to very great harm. Trust is the only thing that matters. If you didn't trust the engineer who built a plane, you wouldn't fly in it, it's that simple.

If the idea of a vaccine is to improve health, lets look at what it means to be healthy, define that (and not just in the short term.) If we need to sensitise the immune system in some way for certain diseases, let's make better vaccines.....ones that aren't a russian roulette or chronic disabler for a proportion of the population. Let's not start with the position that it's ok to take risks with the life of a child for the sake of another.