Table 1.

Summary of influenza outbreaks from 1700 to 1977 labelled as pandemics, listed by Morens and Taubenberger, Mamelund, Lattanzi, Hampson and Mackenzie, Potter, Garrett, Beveridge, Kilbourne, Pyle, and Patterson [4–13]. The pandemic year of 2009 was also included in the data

Year	# in agreement	[4]3	[5]4	[6]5	[7]6	[8]7	[9]8	[10]9	[11]10	[12]11	[13]12
1729	8	X	X	X	X	X	X	X			X
1732	7	X	X		X			X	X	X	X
1761	1						X
1775	2	X							X
1781	10	X	X	X	X	X	X	X	X	X	X
1800	2					X		X
1830	8		X	X	X	X	X	X		X	X
1833	5	X	X		X				X		X
1836	3						X		X		X
1847	5					X	X	X	X	X
1857	1							X
1889	10	X	X	X	X	X	X	X	X	X	X
1898	2				X	X
1899	1										X
1918	10	X	X	X	X	X	X	X	X	X	X
1946	1								X
1957	10	X	X	X	X	X	X	X	X	X	X
1968	10	X	X	X	X	X	X	X	X	X	X
1977	5					X	X	X	X		X
2009		–	–	–	–	–	–	–	–	–	–

³Cites [12, 33–35, 43]. Has 1733 not 1732.

⁴Cites [12, 13, 33–35, 38, 43, 44].

⁵Cites [8, 10, 12, 13, 34, 35, 38, 43, 44].

⁶Cites [8, 10, 13].

⁷Cites [10, 12, 13, 33–35, 38, 43]. Has 1799 not 1800.

⁸Cites [13, 38, 45].

⁹Cites [12, 13, 33–35, 43, 44].

¹⁰Cites [33, 35, 46]. Has 1782 not 1781.

¹¹Cites [33, 35, 38, 43].

¹²Cites [33, 35, 38, 43, 44, 47].