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رویدادها

1. 01۲۰۲۰COVID-19 declared a pandemicقوت ارتباط

   WHO declaration triggers synchronized global lockdowns, an oil-demand collapse (WTI briefly trades negative on 20 April 2020), and unprecedented fiscal/monetary stimulus across every country in this database.

   چرایی این پیوند: The share of deaths attributed to communicable diseases and maternal/prenatal/nutrition conditions more than tripled, from 6.2% (2019) to 26.1% (2020) and 29.5% (2021), reversing two decades of steady decline (13.9% in 2000) -- one of the cleanest, most directly attributable shocks in this entire dataset given how tightly the WHO pandemic declaration date lines up with the jump.

   ملاحظه: None substantial -- this is a near-textbook case of a single, dateable global event producing an unambiguous chart-visible signature.

   تأخیر اثر: immediate (same year)منبع: World Health Organization