http://www.ebicom.net/~rsf1/vel/1918ss.htm
Distribution
584 Day Synodic Period
Legend: Smoothed sunspot numbers  (orange area.)  Venus inferior conjunctions with Earth (red vertical lines)  Barber's bacterial invasions  (green shaded vertical bars).  Onset dates of influenza pandemics or pandemic scares   ( P's )
Venus inferior conjunction?
2002/04