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New Delhi, Jul 6: The Indian Academy of Sciences, a Bengaluru-based body of scientists, has said the Indian Council for Medical Research's (ICMR) target to launch a coronavirus vaccine by August 15 is "unfeasible" and "unrealistic".

The IASc said while there is an unquestioned urgent need, vaccine development for use in humans requires scientifically executed clinical trials in a phased manner.

While administrative approvals can be expedited, the "scientific processes of experimentation and data collection have a natural time span that cannot be hastened without compromising standards of scientific rigour", the IASc said in a statement.

In its statement, the IASc referred to the ICMR's letter which states that "it is envisaged to launch the vaccine for public health use latest by 15th August 2020 after completion of all clinical trials".

The ICMR and Bharat Biotech India Limited, a private pharmaceutical company, are jointly developing the vaccine against the novel coronavirus -- SARS-CoV-2.

The IASc welcomes the exciting development of a candidate vaccine and wishes that the vaccine is quickly made available for public use, the statement said.

"However, as a body of scientists including many who are engaged in vaccine development IASc strongly believes that the announced timeline is unfeasible. This timeline has raised unrealistic hope and expectations in the minds of our citizens," it said.

Aiming to launch an indigenous COVID-19 vaccine by August 15, the ICMR had written to select medical institutions and hospitals to fast-track clinical trial approvals for the vaccine candidate, COVAXIN.

Experts have also cautioned against rushing the process for developing a COVID-19 vaccine and stressed that it is not in accordance with the globally accepted norms to fast-track vaccine development for diseases of pandemic potential.

The IASc said trials for a vaccine involve evaluation of safety (Phase 1 trial), efficacy and side effects at different dose levels (Phase 2 trial), and confirmation of safety and efficacy in thousands of healthy people (Phase 3 trial) before its release for public use.

Clinical trials for a candidate vaccine require participation of healthy human volunteers. Therefore, many ethical and regulatory approvals need to be obtained prior to the initiation of the trials, it added.

The IASc said the immune responses usually take several weeks to develop and relevant data should not be collected earlier.

"Moreover, data collected in one phase must be adequately analysed before the next phase can be initiated. If the data of any phase are unacceptable then the clinical trial is required to be immediately aborted," it said.

For example, if the data collected from Phase 1 of the clinical trial show that the vaccine is not adequately safe, then Phase 2 cannot be initiated and the candidate vaccine must be discarded.

For these reasons, the Indian Academy of Sciences believes that the announced timeline is "unreasonable and without precedent", the statement said.

"The Academy strongly believes that any hasty solution that may compromise rigorous scientific processes and standards will likely have long-term adverse impacts of unforeseen magnitude on citizens of India," it said.

May 29: Over 45,000 stranded Indians were brought back home from abroad under the Vande Bharat mission and another 1,00,000 will be evacuated till June 13, the Ministry of External Affairs said on Thursday.

The mega evacuation mission was launched on May 7.

MEA Spokesperson Anurag Srivastava said the government is also assisting return of stranded Indians from remote locations in Latin America and Caribbean, Africa, and parts of Europe.

"This is being done by taking advantage of foreign carriers flying to India primarily for evacuation of their nationals," he said during an online media briefing.

He said a total of 45,216 Indians were brought back till Thursday afternoon and they include 8,069 migrant workers, 7,656 students and 5,107 professionals.

About 5,000 Indians have returned through land border from Nepal and Bangladesh.

In the first phase of the mission from May 7 to 15, the government evacuated around 15,000 people from 12 countries. The second phase of the evacuation mission was scheduled from May 17 to 22. However, the government has extended it till June 13.

Srivastava said a total of 3,08,200 people have registered their request with Indian missions abroad for repatriation to India on compelling grounds.

"During the phase two, a total of 429 Air India flights (311 international flights + 118 feeder flights) from 60 countries are scheduled to land in India. The Indian Navy will be making four more sorties to bring back returnees from Iran, Sri Lanka and the Maldives," Srivastava said.

The MEA spokesperson said the government is targeting to bring back 1,00,000 people from 60 countries by the end of phase two of the Vande Bharat mission.

"Preparations for third phase of Vande Bharat Mission are well underway," he said.

As per the government's policy for evacuation, Indians having "compelling reasons" to return like pregnant women, elderly people, students and those facing the prospect of deportation are being brought back home.

Mathura, Mar 2: Union Minister of state Sadhvi Niranjan Jyoti on Sunday said after the Citizenship (Amendment) Act (CAA), the Centre might bring a population control law.

Jyoti claimed that she has already spoken to Prime Minister Narendra Modi in this regard.

She said she believes that this issue is under the prime minister's consideration and he himself has discussed the importance of bringing this law.

Jyoti arrived here on Sunday to attend a tribute meeting held at Swami Vamdev Jyotirmath in Chaitanya Vihar. Unnao MP Sakshi Maharaj was also present at the event.

"There was a time when abrogation of Article 370 in Jammu and Kashmir was impossible. It was feared that if such thing happens, there will be bloodbath. No one will be hold the national flag in Kashmir. But this government can bring any law in favour of the nation," Jyoti said.

"Now, everyone believes that if Article 370 can be removed...Prime Minister Narendra Modi can bring any law which is important for the country," she added.