Harvard Health Letter

Influenza-associated deaths

Estimated number of annual influenza-associated deaths with underlying respiratory and circulatory causes — United States, 1976-77 through 2006-07 influenza seasons

Season

Prominent influenza type/subtype

Number (est.)

1976-77

B / A(H3N2)

16,612

1977-78

A(H3N2) / A(H1N1)

27,987

1978-79

A(H1N1)

4,681

1979-80

B

10,358

1980-81

A(H3N2) / A(H1N1)

19,648

1981-82

B / A(H1N1)

5,369

1982-83

A(H3N2)

26,171

1983-84

A(H1NI) / B

13,725

1984-85

A(H3N2)

34,937

1985-86

B / A(H3N2)

17,398

1986-87

A(H1N1)

3,349

1987-88

A(H3N2)

21,280

1988-89

B / A(H1N1)

15,093

1989-90

A(H3N2)

26,582

1990-91

B

12,264

1991-92

A(H3N2) / A(H1N1)

23,459

1992-93

B/ A(H3N2)

23,043

1993-94

A(H3N2)

26,937

1994-95

A(H3N2) / B

23,911

1995-96

A(H1N1) / A(H3N2)

17,618

1996-97

A(H3N2) / B

33,353

1997-98

A(H3N2)

32,241

1998-99

A(H3N2) / B

31,928

1999-00

A(H3N2)

36,520

2000-01

B / A(H1N1)

12,047

2001-02

A(H3N2)

44,970

2002-03

B / A(H1N1)

18,945

2003-04

A(H3N2)

48,614

2004-05

A(H3N2) / B

47,117

2005-06

A(H3N2)

40,101

2006-07

A(H1N1) / B / A(H3N2)

15,573

Average

23,607

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