This is what I posted on the Canadian Travel Forum in response to a post about returning to Disney.
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I'm not a doctor (nor do I play one on television), but everything that I have been reading suggests that it will be 12-18 months before a safe and effective vaccine can realistically be expected (and then you have to factor in production time for seven billion doses).
Quite frankly, looking at the short (instead of the long) term future, I would think that it is unlikely that life will start returning to some semblance of normalcy until one of two things happens - either an effective treatment is developed or the experts can agree on whether or not it is possible to re-catch Covid (the latest that I have heard from Dr. Fauci was that it was unlikely but not a certainty) and a reliable test is developed to determine whether or not an individual has had prior exposure and can therefore end social distancing and self-isolation.
I have a DL vacation booked for the last week of August, so I would love for a miracle cure to be in place by then, but I'm assuming that the odds of that are slim (trending towards none). I can tell you that all of the college classes I am scheduled to teach for the spring/summer session are online and, from what I have seen, it seems more likely than not that in-person classes will not be resuming in September (for either my students or my daughter in High School).
Even if things have started to somewhat improve by late summer or fall, I would still have to think long and hard about traveling outside of Canada for some time to come.
As a pragmatist (trending towards a pessimist), I'm working on the assumption that travel medical insurance is going to be hard to come by (and likely extremely expensive) for the foreseeable future and, even if cross-border travel were permitted if someone in your party had not yet been exposed to Covid (guessing it's a long, long, long time before that happens), would you really want to be outside of Canada without medical insurance??? As much as my family and I are obsessed with Disney, nobody's health (and our financial future) is worth the risk of premature travel into the US. As much as I'm saddened that we have not yet seen Galaxy's Edge, it will still be there in a year (or two or three years)...
Of course, all future travel is predicated on my wife and I still having jobs once all is said and done.
Just an fyi - everything I have said above is strictly my opinion and I do not claim to know any more than anyone else in this forum.