Now obviously you can translate the idea of something being a preventative about illness or sickness, but it's very difficult to suggest in idiomatic modern English that roses can be a protection against evils, because you really, we really don't have that kind of concept, normally now, although there are many uses of erm, groups of people who might retain such a concept, and if something like that arises, you obviously can't make it idiomatic, because there's just no way it's going to work idiomatically in English.