HIV is transmitted when people expose their partners to the virus. We get at that by educating people. We want to encourage people to get tested and to be up front with their partners.
I've probably told hundreds of people that their first HIV test is positive. Part of our conversation is how they can prevent exposure to other people. People are quite open to that kind of education 99% of the time. It's not an easy conversation that they have to have. With the right support, almost everybody does it.
My point is that the threat of criminalization does not have any role except to discourage people from going that route and discussing it with their partners. The steady number of people getting infected in Canada mostly affects gay men populations. Almost all of those cases are people who have not been tested and don't know their status, or have decided they want to keep it quite secret and have decided not to be on antiretroviral therapies. Those kinds of decisions are somewhat influenced by the risk they think they face when they get tested and when they disclose stuff.