Foreigners should benefit from vaccination program

Epidemiologists will tell you that for a vaccination program to be effective in preventing a pandemic it is not necessary to inoculate the whole population. Rather, if the number vaccinated exceeds a smaller, critical proportion, the spread of the disease will still fizzle out for lack of dissemination.

However, this critical number has to be reached or else the reverse will occur, namely, that although vaccinated individuals will be protected, the pandemic will still rage through the rest of the population.

It is with this in mind that I feel concerned that so many people in Beijing (presumably also in the rest of the country) are declining to be vaccinated even though it is provided free to nearly all those who want it.