This is a terribly worded public health message that seems to be spreading like a virus: it is now appended to routine SMSs from public sector banks. Is carelessness alright once a cure is found? Is the existence of a cure a license to be careless? Not at all! Prevention is better than cure, whatever the disease, whether it can be cured or not — even today, with all the power of modern medicine at our fingertips. The cure can sometimes be worse than the disease — even today.
Double punctuation is ugly, but unavoidable sometimes. For example, it appears in dialogue: He said, "I try to avoid double punctuation." The period and closing quote bump against each other, and nothing can be done about it. Other examples are given in this nice article on double punctuation: https://www.subversivecopyeditor.com/blog/2010/08/double-punctuation.html (check out the comments section of the article for a ringside view of a grammatical kerfuffle that has nothing