Be Optimistic..
However, Generally, we've seen with the flu, year over year, we've had points in statistics where effectiveness was as low as 10-15%. This is because these viruses mutate rapidly, and the vaccine effectiveness plummets within MONTHS.
There are already hundreds if not thousands of strains.
So, if and when they start a rollout, KNOW THAT, it's not perfect, it's not a cure, it doesn't prevent infection, it only mildly lowers risk of dying (at the population level).
At the individual level if we get a vaccine shot today, we shouldn't behave differently. Social distancing should go the length of YEARS. Be cautious around old people, they are at high risk regardless.
This is the REALITY that's been muddled.
Any country that holds up a banner saying 0-cases, 0-suspected, that's political propaganda, it's impossible, it's a lie. Maybe the intention is not-malicious (to calm the population), but it simply can not be true.
EVEN IF it was the case, it CAN NOT Remain that way for long.
Covid 19 is forever, there is every indication it is to become endemic in the human population, like HIV, the 4-other Coronaviruses, Hepatitis, Flu, etc etc..