Hyderabad: People need not panic over new research findings that coronavirus is airborne as studies cited by a group of over 200 scientists only convey it can be 'at least temporarily' in air and does not mean the pathogen is flying all over and will infect everyone, an expert has said.

This meant, people should wear masks for a longer period of time and continue to take other precautions such as social distancing to keep off the virus, Director of the CSIR-Centre for Cellular and Molecular Biology (CCMB) here Rakesh Mishra said.

The letter of 239 scientists to the World Health Organisation (WHO) saying there was evidence that the coronavirus is airborne was based on two research papers, he said.

"Those are good studies. Based on that, what is being communicated to WHO is that the virus can be at least temporarily airborne, which means it can travel in droplets of smaller size less than five microns which will mean that it will be hanging in the air for longer than bigger droplet which settles down in a few minutes," he told PTI.

It meant, small droplets released when a person speaks or breathes would be in the air for some time.

Hence, people have to wear a mask for a longer period of time, even if a person has left (a room) or when they go to a place, as someone there may have been potentially infected, he said.

"But, at the moment, there will not be, as far as I see, any major change in guidelines except a few modifications like this and there is no particular need to be stressed or panic that the virus is flying all over the place and it will be infecting everyone," Mishra said.

According to a report in New York Times, the 239 scientists from 32 nations have written to the WHO, saying there is evidence that coronavirus is airborne and even smaller particles can infect people, a significant departure from the UN health agency's claim so far that COVID-19 is spread primarily through coughs and sneezes.

In an open letter to the WHO, the scientists have outlined the evidence showing that smaller particles can infect people, and are calling for the agency to revise its recommendations.

The WHO has long held that the coronavirus is spread primarily by large respiratory droplets when an infected person coughs or sneezes.

Mishra said the research findings were good as they would help in evolving more ways to plan and protect against the virus.

He felt WHO would take note of the research findings sent to it by the scientists.

The mechanism of the virus is still similar except that it will hang for a little longer time in the air.

"Otherwise, there is no major change that has to come (in precautions)," he said.

People should take the same precautions, including maintaining physical distance and avoiding rooms where multiple people are present, particularly those lacking aeration such as AC rooms, the scientist said, adding gathering in a closed space should be avoided strictly.

They can continue to take the same precautions, but masks should be worn for a longer time, he said.

He also observed that it was too early to say that enough had been known about the virus.

It was only six-months-old, and that a lot more needed to be learned, including about what it does after infecting a person.

Such knowledge would help in treating patients, he said.

"I would say we have made tremendous progress but lots of things need to be still figured out," he added.

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Moscow (PTI): Iran's Foreign Minister Abbas Araghchi on Monday met Russian President Vladimir Putin, who hailed the Iranian people for fighting bravely and heroically for their sovereignty and said Moscow is ready to do its best to help bring peace to West Asia as soon as possible.

Araghchi, who held talks with Omani and Pakistani leadership before arriving in Russia, met Putin in St. Petersburg and thanked him for supporting Iran, state-owned TASS news agency reported.

"Russia is ready to do everything in its power to ensure that peace in the Middle East is achieved as soon as possible," Putin said during his meeting with Araghchi, which was also attended by Russian Foreign Minister Sergey Lavrov.

Revealing that he received a message from Iranian Supreme Leader Mojtaba Khamenei last week, Putin asked Araghchi to convey his "gratitude for this message and best wishes for his health and well-being."

He praised the Iranian people for fighting "bravely and heroically" for their sovereignty, Iran's state-run PRESS TV reported.

"We really hope that, based on the courage and desire for independence, the Iranian people, under the guidance of the new leader, will weather this difficult period of trials and peace will come,” Putin said.

He also stressed that Russia “intends to maintain” its strategic relations with Iran.

Araghchi said that the world witnessed Iran’s strength in countering the US during the recent war, and that the Islamic Republic is a "stable and powerful establishment."

"With their courage, the Iranian people succeeded in resisting the US aggression and will be able to endure it,” he said.

He said that it became clear that Iran has “great friends and allies” like Russia, and conveyed “warmest greetings” from Supreme Leader Mojtaba Khamenei and President Masoud Pezeshkian to the Russian leader.

Araghchi said relations between Moscow and Tehran represent a “strategic partnership at the highest level” and will continue to develop "regardless of circumstances."

"We are grateful to you for the solid and strong positions in support of the Islamic Republic of Iran," he said.

Foreign Minister Lavrov said that the talks between President Putin and the Iranian Foreign Minister were "useful and constructive."

Kremlin Spokesman Dmitry Peskov later said that Russia is "ready to provide any good offices, any mediation services that are acceptable to the parties."

"We will be ready to do everything so that ultimately peace ensues, guaranteed peace, and that there is no return to hostilities," Peskov was quoted as saying by TASS.

He was asked how Moscow can assist in future negotiations on the Iranian settlement.

Araghchi arrived in Russia after his whirlwind trip to Islamabad, which, according to him, was “very productive” and involved “good consultations" with Pakistan's Army Chief Field Marshal Asim Munir, amid uncertainty over the second round of peace talks to resolve the war in West Asia.

"We held good consultations with our friends in Pakistan. The trip was successful. We assessed the outcome of our recent (meetings) and discussed in what direction and under what conditions talks can move on,” Araghchi said in a video posted on his Telegram channel upon his arrival in St Petersburg.

Referring to the second round of talks between the US and Iran to resolve the conflict in West Asia, Araghchi said: "Developments have taken place in the negotiations."

"Despite some progress in earlier rounds, the talks failed to reach their objectives due to the Americans' approach, the excessive demands they made, and the wrong approaches they adopted. Therefore, it was necessary to consult with our friends in Pakistan to review the latest situation,” Iran's official news agency IRNA quoted him as saying.

He said that the trip to Pakistan was a good opportunity to review developments related to the US-Israeli war against Iran, expressing confidence that “these consultations and coordination between the two countries will be highly significant.”

Araghchi arrived at St. Petersburg's Pulkovo Airport early Monday, where he was welcomed by Russian officials and Iran’s ambassador to Russia, Kazem Jalali, the report said.

The first round of peace talks between Iran and the US, held on April 11 and 12, failed to bring the desired result for the parties to the conflict.

The Iranian minister arrived in Islamabad for the second time on Sunday after a short visit to Oman, where he held talks with Sultan Haitham bin Tariq al-Said on security in the Strait of Hormuz and diplomatic efforts to end the Iran-US conflict.

After Araghchi left Pakistan for Oman on Saturday, President Donald Trump announced that US negotiators Steve Witkoff and Jared Kushner would no longer be going to Islamabad for talks with Iran, contending that Washington held all the cards on the matter.

Trump on Sunday reiterated that the US and Iranian officials can talk by phone for a peace solution to the conflict.

On Tuesday, Trump extended the two-week ceasefire with Iran indefinitely to give Tehran more time to prepare a unified proposal to end the war, just hours before the truce was set to expire.

The war began when the US and Israel jointly attacked Iran on February 28, killing Iranian Supreme Leader Ayatollah Ali Khamenei and several top commanders. The retaliation by the Islamic Republic extended the war to the entire Gulf region.