Canadian-coconut, mmm. With improved understanding of the transmission of smallpox the primary use of the smallpox vaccine was localised in support of outbreak quarantine, in effect a second fence. Supplies of the vaccines are still maintained against the possibility of further outbreaks. And whatever gave you the idea that scarlet fever is no longer a problem? It is still very much with us, although it is easily treated with anti-biotics. Like MDR TB and MRSA that may not, and most likely will not, always be the case.