100% effective at preventing serious cases is good news at least. There is a lot of speculation at how they arrived at 50.4% and their definition of ' very mild cases'. The devil is in the details. The early trials looked pretty good for antibody development (below). I wouldn't expect a great T cell response from an inactivated vaccine though, so probably not the best vaccine out there IMO.
As to the point raised by Cookster15 about how people can put themselves in risky situations where the virus is thriving... If you are in a country without a big outbreak, you might not realize how normal everyday life is in places like the US that are experiencing large outbreaks. This isn't Ecuador, where bodies were being left in the street. People here are just well insulated from the effects of COVID if they want to be. Sure, there are different rules and not everything is open any more. But there are no shortages or strikes. Toilet paper is plentiful! The risk is just too abstract. We are proving the old adage that the death of a person is a tragedy, while the death of thousands is a statistic. Combined with the fact that 'normalcy' has a gravity that pulls people in and you get a situation where life carries on, which obviously helps the outbreak keep going too. You can't have one without the other. At least not for long!
Safety, tolerability, and immunogenicity of an inactivated SARS-CoV-2 vaccine in healthy adults aged 18–59 years: a randomised, double-blind, placebo-controlled, phase 1/2 clinical trial
Taking safety, immunogenicity, and production capacity into account, the 3 μg dose of CoronaVac is the suggested dose for efficacy assessment in future phase 3 trials.
www.thelancet.com
I think you are right about the variant. So many countries had settled around an R of ~1 for the old strain. Bumping up the transmission means strategies that worked before will not anymore. That is clearly a factor in the UK and Ireland. Add the holiday laxity and you end up with a big problem. I think Ireland has the worst current outbreak in the world now.England has been in various stages of lockdown since November - Normally when you have a lockdown it takes about 2 weeks to reach a peak infection rate and then the numbers gradually trend down - But in England's case the numbers are increasing exponentially at a ridiculous rate which is defying science - I guess this is probably related to the new variant of the virus- Even the scientific experts are shocked by the figures - Certain that Baltimore will provide more information/thoughts.
As to the point raised by Cookster15 about how people can put themselves in risky situations where the virus is thriving... If you are in a country without a big outbreak, you might not realize how normal everyday life is in places like the US that are experiencing large outbreaks. This isn't Ecuador, where bodies were being left in the street. People here are just well insulated from the effects of COVID if they want to be. Sure, there are different rules and not everything is open any more. But there are no shortages or strikes. Toilet paper is plentiful! The risk is just too abstract. We are proving the old adage that the death of a person is a tragedy, while the death of thousands is a statistic. Combined with the fact that 'normalcy' has a gravity that pulls people in and you get a situation where life carries on, which obviously helps the outbreak keep going too. You can't have one without the other. At least not for long!