[nomadking]

Originally Posted by spiderplant

No, it says nothing about serious illness. It might prevent it, it might not. But the doubts were serious enough for SA to sell 1 million doses that had already been delivered, and switch to J&J instead.

The ongoing case and death rates in Chile, despite having 47% of the population vaccinated, suggest otherwise:
https://www.worldometers.info/coronavirus/country/chile
https://ourworldindata.org/covid-vaccinations

Link

And while the vaccination rollout has indeed been fast, it only started in late December, with front-line health care workers, those over 90, and teachers first in line.
So the vast majority of Chileans would not yet have been vaccinated by the time they met up with relatives and friends for their summer holidays in January and February.
...
There is also confusion about how the vaccine that the vast majority in the country has received works, Prof Bueno adds. More than 93% of the doses administered in Chile so far have been CoronaVac, produced by the Beijing-based biopharmaceutical company Sinovac.
Data on the efficacy of the CoronaVac vaccine is varied. Brazilian trials suggested an efficacy rate of around 50.4% but results from late-stage trials in Indonesia and Turkey suggested a much higher rate - between 65% and 83%.

Link

There are now 86 local authorities with five or more confirmed cases of the Indian Covid variant, Health Secretary Matt Hancock has said.
"This isn't just about Bolton and Blackburn," he said, referring to the areas seeing a spike in cases.

Vaccines don't take effect instantly, it takes time for the immune system to generate any immunity. During that time, people are still susceptible to getting the real thing. People are going to ignore that and end up still spreading it.

Vaccination centres might end up being super-spreader events with loads of younger people and others who have not followed the simple rules, now attending them.