July 1, 2022: The Centers for Disease Control and Prevention has listed Fairfield, Hartford, New London, Tolland, and Windham Counties in Low/Green the as part of its COVID-19 Community Levels Map. Only Litchfield, Middlesex and New Haven Counties are listed in the Medium/Yellow category. Residents who live in the Medium /Yellow counties who are at a high risk for severe illness, should talk to their health care provider about whether to wear a mask and take other precautions. These residents should stay up to date with their COVID-19 vaccines and get tested if they have symptoms. Visit the CDC COVID-19 Community Levels Map for updates.

Case Occurrence of Selected Diseases (Connecticut)

 
YEAR MEASLES RUBELLA MUMPS PERTUSSIS* TETANUS HIB VARICELLA*
1969 649 1695 4086 22 1
1970 117 620 3704 71 2
1971 1190 477 1612 21 3
1972 1540 304 1168 24 1
1973 1789 915 1632 10 2
1974 183 422 1698 32 0
1975 129 423 812 12 2
1976 295 132 757 16 1
1977 806 318 379 8 1
1978 327 206 140 11 1
1979 4 258 231 5 1
1980 25 23 103 6 1
1981 10 13 53 2 2
1982 6 6 29 5 0
1983 9 3 23 7 0
1984 14 1 10 6 1
1985 7 4 8 13 0
1986 9 1 23 27 0
1987 22 0 16 31 0 29
1988 15 0 10 22 1 56
1989 229 1 11 24 0 38
1990 196 3 17 31 1 44
1991 29 1 14 25 0 18
1992 6 1 8 50 1 13
1993 9 0 8 102 1 10
1994 4 3 12 44 1 8
1995 2 40 4 34 0 7
1996 2 4 1 49 0 1
1997 1 5 1 36 0 3
1998 0 29 3 56 0 2
1999 2 0 0 35 0 2
2000 0 1 3 54 0 0
2001 1 0 0 25 0 0 1704
2002 1 0 1 30 0 0 1816
2003 0 0 1 77 0 0 1583
2004 0 0 0 67 0 0 1902
2005 0 0 1 86 1 1 1709
2006 0 1 0 126 0 2 1725
2007 0 0 2 89 0 3 1438
2008 0 1 0 55 0 0 857
2009 0 0 1 56 0 1 486
2010 1 0 11 109 0 1 323
2011 1 0 0 68 0 0 304
2012 1 0 0 183 0 0 266
2013 0 0 4* 60 0 0 223
2014 5 0 3* 100 0 0 182
2015 0 0 4* 74 0 1 165
2016 1 0 36* 96 0 3 116
2017 0 0 13* 75 1 0 111
2018 3 1 3* 43 0 1 179
2019 4 0 13* 62 0 2 122
2020 0 0 17* 9 0 1 31
2021 2 0 1** 1** 0 *** 35**
* Confirmed and probable cases
** Case counts are not yet finalized
*** Data unavailable at the time of reporting
 Polio: 1969 -- 1 case    1972 -- 11 cases  Diphtheria: last case: 1962