The latest on the coronavirus pandemic and vaccines

Two drugs typically used to treat rheumatoid arthritis were found to separately improve survival and speed up recovery among critically ill Covid-19 patients, according to early research by an international team.

Data from the REMAP-CAP trial showed that giving either tocilizumab or sarilumab infusions to critically ill Covid-19 patients was associated with an 8.5% improvement in surviving the disease and with being able to be discharged from a hospital's intensive care unit about a week to 10 days faster.

"That's a big change in survival," Anthony Gordon, a senior investigator in the REMAP-CAP trial and a professor at Imperial College London in the United Kingdom, said in a briefing. "We also saw the patients recovered more quickly. They were getting better and able to be discharged from the ICU quicker -- and that was on average and every patient is slightly different."

The findings -- which were posted in a pre-print paper on medrxiv.org but have not been published in a peer-reviewed journal -- included data on more than 800 critically ill Covid-19 patients hospitalized across six countries. The researchers emphasized that the findings were only among critically ill patients.

The new findings are a pivot from some separate studies that previously have found tocilizumab to fall short as a treatment for hospitalized Covid-19 patients.

CoronaVac, the Covid-19 vaccine developed by the Chinese company Sinovac, has been shown to have an efficacy of 78% during phase 3 trials in Brazil, its local partner, the Butantan Institute, announced on Thursday. 

"Today is a very important day for Brazil, for Brazilians, for life and health,” Sao Paulo Governor Joao Doria said during a press conference, alongside state health officials and executives from the Butantan Institute.  

“This result means that the vaccine developed by the Butantan Institute has a high level of efficiency and efficacy protecting the lives of Brazilians against Covid-19,” Doria also said. 

The phase 3 trials involved 13,000 health workers across eight Brazilian states. According to Reuters, Butantan Director Dimas Covas said that the full CoronaVac data would be released in an unspecified scientific publication but did not provide a timeline.

Doria also said his government, along with the Butantan Institute, had begun the process of applying for an emergency use authorization from ANVISA, Brazil’s national medicine agency, “with the objective of starting the vaccination in São Paulo" from January 25.

Even though the efficacy falls shorts of the success rates of the Pfizer/BioNTech and Moderna's Covid-19 vaccine candidates, CoronaVac is easier to transport and can be stored at normal refrigerator temperatures, Reuters reports.

Iran's Supreme Leader Ayatollah Ali Khamenei said on Friday that he does not trust coronavirus vaccines produced by the Western countries and called on officials to prohibit those vaccines from entering the country.   

“We must not import (Covid-19) vaccines from the US, the UK or even France. I do not trust them,” Khamenei said in a speech to the nation televised on state media. 

This comes as Iranian officials complain about US President Donald Trump's "maximum pressure" sanctions hampering their Covid-19 fight.

Iran’s Foreign Minister Javad Zarif has previously accused the US of preventing Iran from making a payment to COVAX, an initiative led by the World Health Organization (WHO), which aims to provide worldwide access to effective Covid-19 vaccines.

“The United States even prevents us from using our own money in different countries to pay COVAX for the vaccine,” Zarif said, adding, “we’ve been trying, our Ministry of Health has been trying, our Central Bank has been trying to transfer money we have in billions in other countries to WHO for COVAX and we haven’t had much success.”  

Last month, Iranian President Hassan Rouhani said his government plans to produce its own Covid-19 vaccine “with the help of Iranian scientists”, and to buy vaccines from abroad, according to state news agency IRNA.

The Delhi government announced a mandatory seven-day quarantine at an isolation facility for passengers arriving from the United Kingdom, even if they test negative for Covid-19 at the airport.

Passengers will then be required to spend a further seven days at a "home quarantine," a press release issued by the city’s Disaster Management Authority said Friday.

Those who test positive will be isolated in a separate facility.  

The Indian Ministry of Civil Aviation announced earlier this month that it was ending its temporary suspension of all flights to and from the UK on January 8.

“To protect Delhiites from exposure to virus from the UK... All those arriving from UK, who test positive will be isolated in an isolation facility. Negative ones will be taken to a quarantine facility for 7 days followed by 7 days home quarantine,” tweeted Arvind Kejriwal, Delhi chief minister.

This comes as India is about to embark on one of the most ambitious mass vaccination programs ever undertaken.

The number of people dying of Covid-19 in Los Angeles County in a day is now equivalent to the number of homicide deaths the city saw in an entire year, Mayor Eric Garcetti said in a Thursday news conference.

The city of Los Angeles has a population of nearly 4 million people, while the county's population is about 10 million.

"All of us need to continue to do more," he said.

The region has for weeks battled a brutal surge of Covid-19 infections and hospitalizations that have translated into climbing numbers of deaths. Los Angeles County officials now say one person dies of Covid-19 every eight minutes.

"People who were otherwise leading healthy, productive lives are now passing away because of a chance encounter with the Covid-19 virus," health officials said earlier this week. "This only ends when we each make the right decisions to protect each other."

More than 8,000 people are hospitalized with the virus across Los Angeles County, 20% of whom are in intensive care units.

Read the full story here:

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The greater Tokyo region has been among the worst hit areas of Japan during the pandemic, surpassing 2,000 daily cases on Thursday for the first time with a record 2,447 new infections, according to updated figures from the Tokyo metropolitan government.

The total number of cases confirmed in the capital now stands at nearly 69,000.

The central government declared on Thursday that Tokyo and three neighboring prefectures -- Saitama, Chiba and Kanagawa -- would go into a state of emergency from Friday.

It's Japan's second state of emergency since the pandemic began.

CNN's Selina Wang has more:

Commuters traveling between China's capital city and the neighboring northern Hebei province must provide evidence they are Beijing residents and a negative Covid-19 test, according to local officials working to contain the country's worst coronavirus flare-up in months.

China has locked down Hebei's provincial capital, Shijiazhuang, in an effort to contain the spread of the virus following the emergence of a cluster that has so far produced more than 300 cases.

An also said that unless necessary, Shijiazhuang and Xingtai residents should not leave their cities and people in other parts of Hebei should not travel to Beijing.

Australia will require all travelers to the country to test negative for Covid-19 before their departure to Australia, Prime Minister Scott Morrison said on Friday.

Morrison also announced that Australia will be reducing the caps on international arrivals in New South Wales, Western Australia and in Queensland by 50% until February 15. This means that roughly 2,500 fewer Australian citizens and permanent residents can enter the country each week. Visitors from New Zealand have been allowed quarantine-free travel to certain Australian destinations.

Earlier, the state of Queensland announced that Greater Brisbane will enter a three-day lockdown after a cleaner from a quarantine hotel tested positive for the UK Covid-19 variant.  

The Philadelphia 76ers will remain in New York City after one of its players tested positive for the coronavirus, a team source told CNN. The source said the team will follow league protocols for Covid-19.

The team was in New York Thursday night after playing the Brooklyn Nets. The Sixers found out about the positive test result during the game, according to The Athletic and Stadium's Shams Charania, who first reported the positive test.

The 76ers are scheduled to play the Denver Nuggets in Philadelphia on Saturday. Before the game, the team said it would not practice on Friday.