Studies conducted by researchers at the University of Montreal Hospital Research Centre provided interesting data on antibodies generated by COVID-19.
A study showed that six out of ten infected people produced neutralizing antibodies only two weeks after the onset of disease symptoms, but the neutralization lasted six weeks. This suggests that the vaccine implementation strategy, if available, would include a booster vaccine.
Since you are concerned about international accessibility and equity, what is your opinion on this level of difficulty added to the solution of vaccinating and immunizing the whole planet?