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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.

New Delhi, Jun 20: After Prime Minister Narendra Modi said there are no foreign incursions into India, China has once again claimed that Galwan valley of Ladakh union territory is located on the Chinese side of the Line of Actual Control (LAC).

In an official statement on the step-by-step account of the Galwan face-off where 20 Indian soldiers were killed, China's foreign ministry spokesperson Zhao Lijian has said the Galwan valley is located on the Chinese side of the LAC in the west section of the China-India boundary.

"For many years, the Chinese border troops have been patrolling and on duty in this region," Zhao said alleging that since April this year, the Indian border troops have unilaterally and continuously built roads, bridges and other facilities at the LAC in the Galwan Valley.

China has lodged representations and protests on multiple occasions but India has gone even further to cross the LAC and make provocations, Zhao said.

By the early morning of May 6, the Indian border troops, who had crossed the LAC by night and trespassed into China's territory, built fortification and barricades, which impeded the patrol of Chinese border troops, Zhao said adding that they deliberately made provocations in an attempt to unilaterally change the status quo of control and management.

The Chinese border troops, he said, were "forced to take necessary measures to respond to the situation on the ground and strengthen management and control in the border areas."

In order to ease the situation, China and India have stayed in close communication through military and diplomatic channels, he said. "In response to the strong demand of the Chinese side, India agreed to withdraw the personnel who crossed the LAC and demolish the facilities, and so they did.

On June 6, the border troops of both countries held a commander-level meeting and reached consensus on easing the situation. The Indian side, he said, promised that they would not cross the estuary of the Galwan river to patrol and build facilities and the two sides would discuss and decide phased withdrawal of troops through the meetings between commanders on the ground.

"Shockingly, on the evening of June 15, India's front-line troops, in violation of the agreement reached at the commander-level meeting, once again crossed the Line of Actual Control for deliberate provocation when the situation in the Galwan Valley was already easing, and even violently attacked the Chinese officers and soldiers who went there for negotiation, thus triggering fierce physical conflicts and causing casualties."

"The adventurous acts of the Indian army have seriously undermined the stability of the border areas, threatened the lives of Chinese personnel, violated the agreements reached between the two countries on the border issue, and breached the basic norms governing international relations," the spokesperson said.

Beijing, he said, hopes that India will work with China, follow faithfully the important consensus reached between the two leaders, abide by the agreements reached between the two governments, and strengthen communication and coordination on properly managing the current situation through diplomatic and military channels, and jointly uphold peace and stability in the border areas.