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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.

Kochi, Mar 24: Long queues were witnessed in front of state beverages corporation outlets across Kerala on Tuesday despite the statewide lockdown to prevent the spread of the coronavirus.

As tipplers thronged the outlets unmindful of the curfew, officials asked them to ensure that they kept a one metre distance between them as part of preventive steps to check the COVID-19 transmission.

Official sources said precautionary measures have been taken at the beverages outlets to prevent the virus spread.

Only those wearing masks were allowed to stand in queues, the sources said.

Police were deployed to ensure that the people standing in queues keep a one metre distance between them, they added.

The opposition Congress slammed the CPI(M)-led LDF government for not taking steps to restrict crowds in front of the Kerala State Beverages Corporation (Bevco) outlets, apprehending that such a situation would pave way for spreading the virus.

Ernakulam district congress committee general secretary Sherin Varghese claimed if the government had implemented a 2017 Kerala high court order directing the beverages corporation to take remedial steps to end long queues in front of the outlets, such a situation would not have arisen.

"Had the beverages corporation complied with the court order, safety and security of persons standing in queues could have been ensured.

Now there is no protective measure to prevent the possible transmission of the coronavirus from a carrier to another person," he told PTI.

Meanwhile, the state government has directed that adequate distance be kept between people standing in queues.

Chief Minister Pinarayi Vijayan on Monday justified the decision to keep the liquor shops open citing the "peculiar" situation prevailing in the state.

Kerala is in a total lockdown since Monday midnight till March 31 to check the virus spread.