I suspect the recent algorithm change is responsible for the shift we're seeing. Let's pull the implementation notes. (edited to fix a unit)
Thanks , that resolves it.
Tessa Keller Have we accounted for the holiday effect? See /u/vgt_tessa_keller/p/plot-0016.
The 2017 break is a rounding artifact — it shows up in every series from that source.
aaron (novem) We saw similar behavior in 2023. (edited to fix a unit)
Description
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Vaccine coverage for childhood diseases reaches high levels in many countries through programs. Campaigns targeting specific diseases show periodic spikes and coverage plateaus.