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Ours is requiring a morning temperature check using a Bluetooth thermometer and phone app, and you have to certify with the app that they're good to go before they're allowed out of the car at drop-off.

Yeah we haven't gone in-person yet, but I think our district has something similar.  

Yeah, I don't know how strong of a correlation there is between being contagious and having a fever. Obviously if you have a fever you're sick, but if you don't have a fever it doesn't mean you're safe.

But you're not supposed to send your kid to school with a fever even before COVID. So I do look at it as one extra useful safety measure where they might catch a student who otherwise felt fine enough despite a fever to go to school, and/or to catch parents who DGAF and would send their kids anyway to get them out of the house, and thus should DIAF.

Yeah I guess it is all this.  A temperature check won't stop every potentially contagious child, but it might stop one, or a handful.  It's a simple enough step.

Yeah I guess it is all this.  A temperature check won't stop every potentially contagious child, but it might stop one, or a handful.  It's a simple enough step.

could be a practice that remains long after COVID

If we ever get a vaccine, I suspect a large percentage of the country will willingly get it.  But it'll take a while.  I'll certainly let others go first and wait a few months.

not everyone has to get the shot for a difference to be made 

Im thinking 50 to 60 percent will make a huge difference like herd immunity

50 to 60 percent of a 100% effective vaccine, plus everyone that's already had it, and any potential T-cell help, would almost certainly reach herd immunity.

If the vaccine is only 25% effective, or ineffective, well, that's something else.

well you would think after 30,000 tests in phase 3 that would be unlikely

If the vaccine is only 25% effective, or ineffective, well, that's something else.

I'd guess if that shows up in Phase 3 the vaccine would not be approved.

They probably need >50% and no side effects.

well you would think after 30,000 tests in phase 3 that would be unlikely

The phased trials don't really have anything to do with that.  Viruses mutate-- inevitably, always.  Which is one reason why even the flu vaccine is only 25% effective (or less) some seasons, even when they toss multiple strains into the flu vaccine. 

We have not once, ever, developed an effective vaccine for any of the numerous coronaviruses we've faced in the past, coronaviruses that have been with us for centuries or even millennia.  There are some different reasons for that, and one could be that we've never tried this hard and applied this level of resources to it, in all of human history.  But another factor is that coronaviruses are tricky bugs.

So yeah, I think it's entirely possible and even likely that we won't ever have an effective vaccine for this, and that it will take its toll on humanity as a novel coronavirus, and that eventually it will have done all the damage it can to the most vulnerable humans, and will no longer be novel and will retreat to being just one of many well-known coronaviruses that harm a certain percentage of the global population every single year.