The greatest concern now is with the Indian variant which may derail the final planned easing of lockdown on June 21.
Major vaccine makers, as well as some policy-makers in the United States, have also suggested that booster or even annual COVID-19 shots might be needed.
William, who is left-handed, is pictured receiving his jab in his right arm after rolling up the sleeve of his top. The Johnson & Johnson vaccine was authorized in late February.
Hancock also said the United Kingdom would host an in-person G7 health ministers meeting in Oxford on June 3-4 ahead of a leaders meeting later in the month.
"The faster we can provide them with vaccines, they will build up immunity to protect them from contracting the disease from devotees".
Mr Vikas Sheel, Additional Secretary of the National Health Mission announced the notification.
It is understood he received the vaccine that was available at the centre - it is not known which one he was given or if Kate, 39, has received her first vaccination.
"So far, there are no serious side effects traced to the vaccine".
Vietnam plans to set up a 25.2 trillion dong (US$1.1 billion) fund to acquire 150 million Covid-19 vaccine doses for its population, the Ministry of Finance said in a statement on Thursday.
These are: Pfizer/BioNTech (100 million); Oxford/AstraZeneca (100 million); Moderna (17 million); Janssen (30 million); Novavax (60 million); Valneva (100 million); GlaxoSmithKline and Sanofi Pasteur (60 million); and CureVac (50 million).
The UK's vaccine rollout has been extended for the second time this week as people aged 34 and 35 in England will now be offered a jab.