Factionalism weakened the dynasty at a critical point
Wikipedia article on the Ming Dynasty (linked to in thread)
As this is the only RPC study I've found following health of recipients for a sustained period, the result suggests broad confirmation bias
"Vaccine Effectiveness" used to measure flu vaccines gives a higher score to a flu vaccine if it damages the immune system of the recipient.
Increased risk of noninfluenza respiratory virus infections associated with receipt of inactivated influenza vaccine.
Human and Animal Studies indicate flu vaccines damage CD8+ T Cells
Annual vaccination against influenza virus hampers development of virus-specific CD8+ T cell immunity in children.
Vaccination with whole inactivated virus vaccine affects the immunity and CD8+ T-cell response in mice.
Vaccination against human influenza A/H3N2 virus prevents the induction of heterosubtypic immunity against lethal infection with avian flu.
Effectiveness of trivalent inactivated influenza vaccine in influenza-related hospitalization in children: a case-control study.
Association between the 2008/09 Seasonal Influenza Vaccine and Pandemic H1N1 Illness during Spring/Summer 2009: Four Observational Studies
The Only Placebo Controlled Study found Child Recipients of a Flu Vaccine got 4 Times as Many Respiratory Infections as Placebo Recipients.
All the pertinent evidence consistently indicates flu vaccines often damage immune systems, especially in children.
Previous flu vaccinations significantly lowered IFN-gamma produced in response to flu in blood from study participants.
The Flu Vaccine Likely has a Negative Cost Benefit