WHO confirms there's 'emerging evidence' of airborne transmission of coronavirus

CNN's Elizabeth Cohen discusses a new letter from 239 doctors talking about how coronavirus travels through the air and the importance of wearing masks.

Posted: Jul 6, 2020 9:59 AM
Updated: Jul 8, 2020 6:00 AM


The World Health Organization confirmed there is 'emerging evidence' of airborne transmission of the coronavirus following the publication of a letter Monday signed by 239 scientists that urged the agency to be more forthcoming about the likelihood that people can catch the virus from droplets floating in the air.

Dr. Benedetta Alleganzi, WHO Technical Lead for Infection Prevention and Control, said during a briefing Tuesday, that the agency has discussed and collaborated with many of the scientists who signed the letter.

'We acknowledge that there is emerging evidence in this field, as in all other fields regarding the Covid-19 virus and pandemic and therefore we believe that we have to be open to this evidence and understand its implications regarding the modes of transmission and also regarding the precautions that need to be taken,' Alleganzi said.

Infectious disease epidemiologist Maria Van Kerkove, with WHO's Health Emergencies Program, said many of the letter's signatories are engineers, 'which adds to growing knowledge about the importance of ventilation, which we feel is very important.'

'We have been talking about the possibility of airborne transmission and aerosol transmission as one of the modes of transmission of Covid-19, as well as droplet. We've looked at fomites. We've looked at fecal oral. We've looked at mother to child. We've looked at animal to human, of course as well,' Van Kerkove said.

She said the agency is working on a scientific brief summarizing the current knowledge around transmission of the deadly virus, which should be available in the coming weeks.

Alleganzi emphasized more research is still needed on Covid-19 transmission.

'So, these are fields of research that are really growing and for which there is some evidence emerging but is not definitive,' she said.

'And therefore, the possibility of airborne transmission in public settings, especially in very specific conditions crowded, closed, poorly ventilated settings that have been described cannot be ruled out. However, the evidence needs to be gathered and interpreted.'

Minnesota Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 61839

Reported Deaths: 1707
CountyConfirmedDeaths
Hennepin19569839
Ramsey7717268
Dakota4507106
Anoka3752115
Stearns290920
Washington216345
Nobles17686
Olmsted176723
Scott159020
Mower11052
Rice10388
Blue Earth9325
Wright8975
Carver8783
Clay78840
Sherburne7328
Kandiyohi7021
St. Louis57319
Todd4292
Lyon4253
Freeborn3601
Steele3512
Nicollet34713
Watonwan3230
Benton3203
Winona26416
Beltrami2440
Crow Wing23814
Le Sueur2261
Martin2095
Chisago2041
McLeod2020
Goodhue1999
Otter Tail1983
Cottonwood1780
Becker1611
Pipestone1589
Polk1554
Waseca1490
Itasca14612
Douglas1441
Carlton1420
Unassigned13141
Dodge1290
Isanti1290
Pine1290
Murray1241
Chippewa1071
Morrison931
Wabasha930
Brown892
Faribault890
Meeker872
Rock850
Sibley842
Koochiching793
Jackson790
Pennington751
Cass742
Mille Lacs723
Fillmore670
Renville665
Lincoln580
Grant563
Swift551
Yellow Medicine520
Roseau520
Pope480
Houston420
Aitkin411
Norman400
Kanabec371
Redwood360
Hubbard350
Wilkin343
Marshall290
Wadena270
Mahnomen271
Red Lake240
Big Stone220
Lake210
Stevens180
Clearwater140
Traverse110
Lac qui Parle80
Cook50
Lake of the Woods40
Kittson30

Iowa Coronavirus Cases

Data is updated nightly.

Confirmed Cases: 49380

Reported Deaths: 942
CountyConfirmedDeaths
Polk10444208
Woodbury373452
Black Hawk315766
Linn242888
Johnson211819
Dallas189835
Buena Vista179412
Scott174314
Dubuque169831
Marshall145026
Pottawattamie133228
Story117315
Wapello90533
Muscatine85148
Webster8268
Crawford7313
Sioux6433
Cerro Gordo63417
Warren5721
Tama55429
Jasper48127
Wright4751
Plymouth47011
Clinton4164
Dickinson3844
Louisa37814
Washington30510
Boone2623
Hamilton2511
Franklin24512
Bremer2307
Clarke2043
Clay2011
Carroll1942
Emmet1934
Des Moines1872
Shelby1861
Hardin1840
Marion1750
Poweshiek1608
Benton1601
Floyd1582
Allamakee1564
Jackson1561
Mahaska14217
Guthrie1355
Cedar1341
Jones1332
Buchanan1291
Henry1274
Madison1252
Butler1252
Hancock1212
Lee1183
Humboldt1181
Pocahontas1172
Delaware1171
Lyon1152
Harrison1101
Cherokee1101
Clayton1063
Taylor1000
Winneshiek971
Iowa971
Page950
Monona910
Kossuth900
Mills890
Palo Alto880
Jefferson870
Calhoun862
Winnebago860
Sac860
Fayette850
Osceola840
Grundy801
Mitchell790
Cass791
Union781
Monroe748
Lucas734
Worth670
Davis612
Montgomery604
Chickasaw550
Appanoose513
Howard500
Fremont430
Greene430
Keokuk371
Van Buren361
Ida310
Adair300
Audubon291
Decatur250
Ringgold231
Wayne201
Adams160
Unassigned10
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