ikke
..Remember that vaccines have not always existed, and yet dogs are not extinct….
This is a very strange way of thinking.. You can use the same arguement as :
.. Remember that medicines have not always existed, and yet humans are not exinct..
or
.. Remember that descent doctors, dentists, anaesthesia have not always existed, and yet humans are not extinct..
This way of thinking puts us back to the medieval ages where plague, rabies or flue killed millions of people, animals,..
Even if there are cases where a vaccination resulted in casualties, it's nothing compared to the millions and millions of lives it saved.