Delta variant more dangerous

UK, delay to 19th July

10 million more vaccine doses

Delta variant

Higher viral loads for longer

Detected in 74 countries

Most contagious variant so far

China, Namibia, US, Scandinavia, Pacific, Mongolia, Brazil, Argentina, Chile

Change in presentation

Cold like features

Symptoms now (since May)


Sore throat

Runny nose



No loss of smell

Guangzhou, China

12% of patients becoming severely or critically ill within three to four days symptom onset

Consistent reduced vaccine efficacy after one dose


Delta increasing

New wave of infections, peak early July

Jakarta hospitals, 75%

Democratic Republic of the Congo

Kinshasa, hospitals overwhelmed

President, Félix Tshisekedi

I am going to take drastic measures to deal with this upsurge of the disease

We’re talking about the Indian variant in particular


Localised lockdowns

Delta variant in the US

Currently 10% of Covid-19 cases in the US

B.1.617.2 variant

Proportion is doubling every two weeks

Probably will become the dominant strain in the US.

Scott Gottlieb, former commissioner, US Food and Drug Administration

I think in parts of the country where you have less vaccination

particularly in parts of the South, where you have some cities where vaccination rates are low

there’s a risk that you could see outbreaks with this new variant

Where less than 50% of adults have had at least one dose

Alabama, Louisiana, Mississippi, Wyoming