Experts say the explosion is being fueled by a local variant of the virus that is suspected to be more contagious.
AstraZeneca said Monday that US tests on more than 30,000 people showed no increased risk of thrombosis.
The coronavirus, which has killed more than 2.7 million people, has been spreading faster recently, with new infections up globally by 14 percent in the last week.
By early February, the city's average daily death toll from Covid-19 soared to more than 110, nearly triple the first wave.
Zevallos resigned last month over a vaccine scandal that saw well-connected individuals, including his mother, jump the queue for their coronavirus jabs.
The researchers were not able to estimate protection against reinfection with Covid-19 variants -- some of them more transmissible -- that did not emerge until after the period studied.
Coronavirus deaths across Europe meanwhile passed the 900,000 mark on Tuesday.
A vaccination team is now in place to quickly review and refine the process of preventing waste and to prevent errors in the future.
The J&J shot however appears less protective than Pfizer and Moderna's regimes, which both have an efficacy of around 95 percent against all forms of Covid-19 from the classic coronavirus strain.
On Thursday, the EMA approved the single-shot Johnson & Johnson vaccine, which is stored at warmer temperatures than its competitors and is easier to distribute.
Before her demise, Cooper had to deal with coronavirus for about six weeks, and was not able to work during that time.
Health officials in Houston reminded everyone to continue wearing masks and to follow health protocols such as practicing social distancing.
The virus and the severe restrictions imposed to battle its spread have crushed global economic growth and plunged millions into poverty.
Twelve hours after he was placed in a prone position, medics turned him face up and were surprised that he had an erection.
The nurses at St. Vincent alleged they are required to take care of five patients, while other hospitals only care for four.
The Global Engagement Center said that thousands of Russian-linked social media accounts have run a coordinated campaign to undermine official narratives on Covid-19.
Brazil, the country second-hardest hit after the United States, has registered more than 266,000 deaths from 11 million reported infections.
Brazil is so far using Chinese-developed CoronaVac and the Oxford University/AstraZeneca vaccine, both of which require two doses.
Since there are already antibodies from the infection, the first vaccine shot would act more like a second booster.
The UK's vaccination programme has rolled out fast since its start in early December, when it became the first country in the world to begin mass inoculation with a fully trialled vaccine.
The World Health Organization this week urged governments to prioritize understanding the long-term effects of infections.
The Covid-19 vaccines are boosting hopes that countries can finally start to emerge from the pandemic that has killed more than 2.5 million people and infected at least 112 million worldwide.