Reported Delta variant cases worldwide

The coronavirus Delta variant, first identified in India, is rapidly spreading across the world and is the most contagious of any Covid-19 strain so far identified, according to the World Health Organisation


NUMBER OF COVID-19 DELTA VARIANT CASES (as of June 28, 2021) 

U.S.
4,400+

UK
60,000+

Germany
1,400+

India
7,800+

Over 1,000 
500-999 
100-499 
50-99 
Under 50 
No data

Note: Countries have different. reporting strategies and testing capacities influencing number of reported cases


WHAT WE KNOW ABOUT DELTA

Variant first found in Indian state of Maharashtra in Oct 2020

Will become dominant strain worldwide, according to WHO

Responsible for more than 90% of new cases in UK and 20% in U.S. (as of mid-June)

Associated with 64% increased chance of household transmission, compared to Alpha variant first identified in UK

More likely than Alpha variant to cause hospitalisation

Vaccines: Slightly less effective at preventing hospitalisation in
people with Delta, compared to those with Alpha variant*

Pfizer-BioNTech
6% less

AstraZeneca
1% less

*After two doses


Sources: Deutsche Welle, GISAID
Picture: Getty Images
© GRAPHIC NEWS