Parvo can be vaccinated against with yearly vaccinations. You cannot prevent cancer but there is some evidence that you can reduce the chances of him getting it by having him on a good diet. A dog with Parvo gets server vomiting and bloody diarrhoea.
Symptoms of cancer vary depending on the type of cancer, look out for any unusual lumps on your dog, or any significant change in behaviour, (basically any odd symptoms). There really is no need to take your dog to the vet every month, just keep an eye on him and make sure he is behaving normally.
Parvo- Vaccine. Cancer is ineveitable. There are some invironmenal elements that '' can bring on the cause'' cancer, I think foods as well, but i'm not fully sure.
Trust me if cancer was fully avoidable my loved ones would still be here.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.