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Paris, Jul 20: Two coronavirus vaccine candidates have proven safe for humans and produced strong immune reactions among patients involved in separate clinical trials, doctors said on Monday.

The first trial among more than 1,000 adults in Britain found that the vaccine induced "strong antibody and T cell immune responses" against the novel coronavirus.

A separate trial in China involving more than 500 people showed most had developed widespread antibody immune response.

The studies, published in The Lancet medical journal, constitute a major step on the road towards a COVID-19 vaccine that is effective and safe for widespread use.

The authors of the studies said that they encountered few adverse side-effects from the vaccine candidates.

However, they cautioned that more research was needed, particularly among older adults, who are disproportionately at risk of dying of COVID-19.

Co-author Sarah Gilbert from the University of Oxford said the results "hold promise".

"If our vaccine is effective, it is a promising option as these types of vaccine can be manufactured at large scale."

Mar 2: Two more positive cases of the novel coronavirus -- one in Delhi and another in Telangana -were reported, the Union Health Ministry said on Monday.

The person from Delhi had travelled to Italy, it said adding he is being diagnosed at RML hospital.

The other person with the coronavirus infection has a travel history to Dubai, the ministry added.

"Both the patients are stable and being closely monitored," the ministry said.

Sunitha Krishnan is the name of the patient from Telangana and she is a social activist.

Krishnan has tweeted, "So going to enjoy hospitality at Gandhi Hospital for two days as admitted in the isolation ward suspected coronavirus. They have not started the tests yet( 1.30 hrs since I arrived).I believe the results make take 48hrs. At this pace, I have a feeling I am might be here sometime."

Dubai, Mar 23: The United Arab Emirates announced on Monday it will temporarily suspend all passenger and transit flights amid the novel coronavirus outbreak.

The Emirati authorities "have decided to suspend all inbound and outbound passenger flights and the transit of airline passengers in the UAE for two weeks as part of the precautionary measures taken to curb the spread of the COVID-19", reported the official state news agency, WAM.

It said the decision -- which is subject to review in two weeks -- will take effect in 48 hours, adding: "Cargo and emergency evacuation flights would be exempt."

The UAE, whose international airports in Abu Dhabi and Dubai are major hubs, announced on Friday its first two deaths from the COVID-19 disease, having reported more than 150 cases so far.

Monday's announcement came hours after Dubai carrier Emirates announced it would suspend all passenger flights by March 25.

But the aviation giant then reversed its decision, saying it "received requests from governments and customers to support the repatriation of travellers" and will continue to operate passenger flights to 13 destinations.

Emirates had said it will continue to fly to the United Kingdom, Switzerland, Hong Kong, Thailand, Malaysia, the Philippines, Japan, Singapore, South Korea, Australia, South Africa, the United States and Canada.

"We continue to watch the situation closely, and as soon as things allow, we will reinstate our services," said the airline's chairman and CEO, Sheikh Ahmed bin Saeed Al-Maktoum.

Gulf countries have imposed various restrictions to combat the spread of the novel coronavirus pandemic, particularly in the air transport sector.

The UAE has stopped granting visas on arrival and forbidden foreigners who are legal residents but are outside the country from returning.