With the simultaneous rise in deaths and drop in births, we're entering the first population decline since the Black Plague, not because of a virus but because of medical dogma.
I don't think this trend will continue steadily. The 15% is not across the board, as Africa has the highest birth rate and the lowest uptake of quackcination. Developed nations have been in growth decline for quite a while, but immigration keeps the population rising in most cases. Japan and South Korea, for example are not as keen on immigration as western countries.
The quackcination campaign is running out of steam and distrust of quackcines is on the rise. This will reduce the number of people exposed to them.
"assuming this trend continued steadily"
I don't think this trend will continue steadily. The 15% is not across the board, as Africa has the highest birth rate and the lowest uptake of quackcination. Developed nations have been in growth decline for quite a while, but immigration keeps the population rising in most cases. Japan and South Korea, for example are not as keen on immigration as western countries.
The quackcination campaign is running out of steam and distrust of quackcines is on the rise. This will reduce the number of people exposed to them.
If new threats arise, I will revisit my view.