Everybody in most of 3rd world uses WhatsApp for everything.<p>The Brazilian Conselho Federal de Medicina (main medical association) published a memo telling doctors not to use it, but very few will pay attention.<p>As always happens in Brazil only a tragedy can make people notice a problem. A couple lawsuits, some national scandal and people will learn.<p>Besides, there is also a cultural element here: privacy is a lot more valued in anglo-saxon cultures than in Latino cultures. Brazilians, Italians and others are a lot less concerned about things such as personal space, body contact, exhibiting in a small bikini, going almost naked in a Carnaval parade, etc.<p>Edit: Just for HN to have an idea of how big WhatsApp is: since May, the number of cell phone lines in Brazil is falling. More than 10 million lines are canceled. Young people are giving up on voice services and using exclusively WhatsApp  for communications.<p>Source: <a href="https:&#x2F;&#x2F;translate.google.com&#x2F;translate?sl=auto&amp;tl=en&amp;js=y&amp;prev=_t&amp;hl=en&amp;ie=UTF-8&amp;u=http%3A%2F%2Fg1.globo.com%2Ftecnologia%2Fnoticia%2F2015%2F12%2Fefeito-whatsapp-e-crise-matam-10-milhoes-de-linhas-de-celular-no-brasil.html&amp;edit-text=&amp;act=url" rel="nofollow">https:&#x2F;&#x2F;translate.google.com&#x2F;translate?sl=auto&amp;tl=en&amp;js=y&amp;pr...</a>