Pfizer says early analysis shows its Covid-19 vaccine is more than 90% effective

One of those longish glorified soap adverts: Kid falls off her bicycle, or out off the tree.

Cool, let's wash our hands with our advertised disinfectant soap.

It kills 99 percent of all germs and bacteria.

But daddy, don't you want 100 percent from me?

Sure, tough guy.

Then why does my soap not give me 100 percent?
Why only 99?

Because ... because it's a crap soap, and we won't purchase it, tomorrow we find you a better soap.

Whoopsie: