Testing in the U.S.

Updated April 3, 2020

This page will be updated daily at noon. Numbers close out at 4 p.m. the day before reporting.

CDC is responding to an outbreak of respiratory illness caused by a novel (new) coronavirus. The outbreak first started in Wuhan, China, but cases have been identified in a growing number of other locations internationally, including the United States.

Public Health Laboratory Testing for COVID-19

This map includes states and territories with one or more laboratories that have successfully verified and are currently using COVID-19 diagnostic tests. As of the evening of April 2, the total number of public health laboratories (PHL) that have completed verification and are offering testing is 95. This includes one or more PHL in 50 states plus DC, Guam, Puerto Rico, and the U.S. Virgin Islands.

This list is provided by the Association of Public Health Laboratories (APHL)external icon. Contact your state health department regarding questions about testing.

Number of specimens tested for SARS CoV-2 by CDC labs (N=4,827) and U.S. public health laboratories* (N=176,715)†

Number of specimens tested for SARS CoV-2 by CDC labs and U.S. public health laboratories

Note: As of March 12, the dates associated with the specimens tested by CDC Labs have been updated to reflect the date the specimen was received by CDC, instead of when they were collected from the patient. Use of the specimen received date better reflects when specimens became available for testing by the CDC Labs.

* Reporting public health labs are 49 state public health labs (AK, AL, AR, AZ, CA, CO, CT, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, VA, VT, WA, WI, WV and WY), the District of Columbia, New York City, Puerto Rico, USAF, and 15 California Counties.

† Non-respiratory specimens were excluded. For state public health labs, the date represents the date of sample collection, if available, or the date tested. For CDC labs, the date represents the date specimen was received at CDC. Results reported as of 4:00 pm ET on April 2 were included. All data are preliminary and may change as more reports are received.

‡ As of 14 March 2020, public health laboratories using the CDC assay are no longer required by FDA to submit samples to CDC for confirmation. CDC is maintaining surge capacity while focusing on other support to state public health and on improving options for diagnostics for use in the public health sector.

§ Data during this period are incomplete because of the lag in time between when specimens are accessioned, testing is performed, and results are reported. Range extended from 4 days to 7 days on March 26.

Lab Collection Dates
Date Collected CDC Labs US Public Health Labs
1/18 4 0
1/19 0 0
1/20 7 0
1/21 3 0
1/22 10 0
1/23 36 0
1/24 53 0
1/25 101 0
1/26 79 0
1/27 77 0
1/28 65 0
1/29 102 0
1/30 256 0
1/31 63 0
2/1 310 0
2/2 33 0
2/3 131 1
2/4 93 0
2/5 104 3
2/6 74 2
2/7 93 0
2/8 79 0
2/9 36 2
2/10 37 1
2/11 95 2
2/12 56 2
2/13 47 1
2/14 36 5
2/15 51 4
2/16 24 1
2/17 7 28
2/18 32 11
2/19 63 6
2/20 55 4
2/21 249 3
2/22 254 3
2/23 67 2
2/24 50 19
2/25 50 13
2/26 80 29
2/27 62 141
2/28 86 180
2/29 80 288
3/1 31 262
3/2 94 564
3/3 73 799
3/4 111 1160
3/5 86 1711
3/6 5 1969
3/7 179 1515
3/8 82 1661
3/9 36 3343
3/10 172 3538
3/11 143 4344
3/12 205 6171
3/13 29 6842
3/14 20 6081
3/15 1 5816
3/16 3 10960
3/17 15 11138
3/18 31 10300
3/19 15 9989
3/20 11 9211
3/21 32 5389
3/22 1 4752
3/23 2 8666
3/24 4 8439
3/25 29 8552
3/26 42 8712
3/27 26 8743§
3/28 9 5608§
3/29 1 4675§
3/30 5 8993§
3/31 34 5489§
4/1 10 572§
4/2 0§