Bharat Biotech Phase 3 results (Covaxin), Data, 77.8% Efficacy Rate

The data of the Phase 3 Covaxin trial have been reviewed by an expert panel at the Central Drugs Authority. Bharat Biotech has created Covaxin and the committee has also approved it. Bharat Biotech Hyderabad released the final analysis on Covaxin’s efficacy during the third phase of clinical trials. 2. 2nd June 2021 Bharat Biotech told that the overall efficacy rate for Covaxin is 77.8 percent against symptomatic infections.

Bharat Biotech Phase 3 results

Bharat Biotech released Phase 2 results for the Covaxin tests. Their results were presented to experts, and they have received their acknowledgement from the panel. This article will inform you about the Phase III trials of Bharat Biotech, Covaxin.

His most recent tweet was on February 2, 2nd July the co-founder of the nation stated that they are extremely very proud of the researchers who put India on the map for developing efficient vaccines. The most recent reports state that symptomatic testing was performed on 130 Covid-19 patients between the ages of 18 and 98. They were carried out at 25 sites across the nation. Below are the results.

Bharat Biotech Phase 3 Data

  • The vaccine had a 77.8 percent effectiveness rate.
  • Covaxin offers an efficacy of 652 percent against Delta Variant. Delta Variant.
  • This vaccine has a 93.4 percent effectiveness against even the most serious infections.
  • Covaxin (inactive form of virus) was made in Bharat Biotech.
  • ICME and NIV Pune work together with Bharat Biotech to develop Covaxin.
  • Bharat Biotech performed the biggest study on efficacy, in which more than 25798 patients were treated from 18 to 1998.

In India, the largest efficacy trial of COVAXIN(r), it was proven safe. Last Phase-3 Preprint Data published on

— BharatBiotech (@BharatBiotech) July 2, 2021

  • The selected candidates were chosen to take part in Bharat Biotech Phase 3, between 16 and 27 November 2020.
  • Two doses were administered to 24419 of the 28798 participants. After this, there was a gap of 4 weeks between doses.
  • 130 Corona-related symptoms were detected in 16973 patients.
  • The efficiency rate total was 77.8 percent.
  • Covaxin has been approved in 16 countries, which includes Brazil and Mexico.
  • Bharat Biotech produces only 23,000,000 doses of vaccine per month.

Below is information we have on the Bharat Biotech Phase3 trial. To find out more about Covid-19 Vaccines, please follow the links.

According to the company, Vaccine provides 85% protection against Delta variants.

Bharat Biotech India Ltd (BBIL), Hyderabad, released long-awaited Phase-3 results on 3 July. CovaxinThis involved over 25,800 volunteers and 25 hospitals in the country.

‘Excellent option’

These findings were highly praised by doctors.

Vincent Rajkumar from Mayo Clinic tweeted that these results “give us all lots of confidence that Covaxin has an excellent option for preventing COVID”

S.P. Kalantri, Mahatma Gandhi Institute of Medical Sciences Wardha, was the Director of Kalantri. This is The HinduIt was clear that the preliminary report had a great deal of detail. Based on preliminary reading, it showed that the study was “well-conducted”, and people were able to make informed decisions about the efficacy of the vaccine.

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The most crucial test of the effectiveness of vaccinations is its ability to prevent death and hospitalisation. Dr. Kalantri stated that the 93.5 percent figure is good. The protection provided for people over 60 is encouraging as well.

He cautioned, however that you shouldn’t speculate about which Covishield or Covaxin was better because of differences in how it was done.

Priya Abraham, director of the ICMR National Institute for Virology (ICMR), released a statement stating “The general efficacy” of the study. During this trip, the ICMR–NIV and BBIL had very productive interactions. Also, the Sera (from blood samples) is being tested against Indian viruses i.e. Delta, Alpha and Beta, Zeta Kappa, Zeta, Zeta, Zeta and Delta. Every Indian is proud of the creation of this vaccine on Indian soil.

NIV was also involved in the development of Covaxin. They also helped to cultivate the virus strain used for the production of the vaccine.

Bharat Biotech began to solicit volunteers in November 2020. The process was completed in January. Although the emergency use authorization was granted in January, some critics raised concerns that it delayed the data on effectiveness because of similar results from other vaccines, such as AstraZeneca and Novavax.

Bharat Biotech has also requested the World Health Organisation. The submission of phase three data is necessary to be eligible for an Emergency Use Licence. This would allow the approval of the vaccine by other countries. From January, India has received less than 4,000,000 doses of Covaxin. Covaxin asserts that it can produce over six thousand doses per month, and up to 10 million doses by September.

Krishna Ella, Chairman & Director of Management, Bharat Biotech and Bharat Biotech, stated in a statement “The success of the safety and effectiveness results of Covaxin because of the conduct of the largest ever COVID trial of vaccines in India confirms the capability of India and other countries in the developing world to be focused on the development of new products and innovations. The latest Indian innovations can now be applied to the protection of the entire global population.

New Delhi: While their Brazil deal has collapsed and the company is looking at two investigations into the attempts to bring Covaxin in this South American country, Bharat Biotech has released the preprint paper detailing the clinical trials in phase 3 of the vaccine.

In an announcement, the company said that Covaxin was effective at 77% during tests.

PTI was informed by Dr Balram Bhargava of Indian Council of Medical Research, director general of the ICMR. The vaccine was developed by ICMR, which then tested it with Bharat Biotech.

Bharat Biotech, which is part of India’s COVID-19 campaign, is being criticized in the US because it has not shared the entire results of the phase 3 clinical trial. This issue was addressed to some extent by the preprint paper, which was published on the medRxiv repository.

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All-encompassing results

According to this report, Covaxin is:

  • For two weeks, the first dose was effective at symptomatic COVID-19.
  • 93.4% efficacious against severe COVID-19
  • 65.2 Percent effective against COVID-19 symptoms due to Delta variant (B.1.617.2)

Phase 3 was performed across several centers and involved 24,419 people ranging from 18 to 98 years old. Bharat Biotech, as well as Indian Council of Medical Research, were recruited between November 16th 2020 and January 7th 2021. Covaxin was approved by the Drug Control Controller General on January 3rd, 2021.

The trial administrator can perform interim reviews of data within two times periods. Once there was 43 cases, the trial administrators could then review the data for the remaining cases. Based on the 130-instance limit, the Preprint Paper presented the analysis of effectiveness.

The study had 25798 participants at the start. Participants were randomly divided into treatment and placebo groups using the double blind procedure. No one knew which group they were, even the trial managers. Two intramuscular doses of Covaxin were administered to the participants of the treatment arm at 28-day intervals.

It was notable that only 22% of COVID-19 sufferers were still symptomatic two weeks after their first dose. Jammi Nagaraj Rao explains in an older articleThis is:

The virus’s attack rate for the control group is called the “background” rate. This rate refers to the rate at which we are able to infer data from the actual world. How much of that “attack rate” is in the control group is what determines the efficacy and how it is weighted according the extent to which the effect of vaccination is responsible.

Researchers calculated the effectiveness at 77.8 percent. The confidence interval (CI), which describes the range of possible values, is a term that refers to the variability in the measured value.

The effectiveness of COVID-19 in patients who are not symptomatic was 63.6%, with a 95% confidence interval between 29.9% and 82.4 percent. COVID-19 Delta variant Covaxin has a reported effectiveness of 65.2 % in symptomatic COVID-19 infection. This is 95% confidence interval.

Patients below 60 years old had a lower overall efficacy of 66.7 percent. The 95% CI ranged from 8% to 90 percent. For patients less than 59, the effectiveness was 79.4% and 95 percent CI ranged from 66 to 88.2 percent.

Covaxin’s 93.4% effectiveness in severe COVID-19 treatment showed a 95 per cent CI between 57.1 and 99.8.

A problem with the CIs

Important to remember that these CIs can be used in a wide range of situations. Covaxin’s ability to combat COVID-19 symptoms, which is caused by delta variation and is for patients 60 years and older, is extremely broad. The claim by Bharat Biotech that Covaxin is effective against COVID-19 is similar. It claims that Covaxin is safe for patients over 60.

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This signal is significant because the information wasn’t “good enough”. To tighten those measurements.

Bharat Biotech released the preliminary results of its Phase 3 trial in March 2021. These were based upon 43 events, i.e. 43 COVID-19 patients were among the 24,419 participant. It was found that Covaxin had an 80.6 percent effectiveness in the study. Dr. Rao cautioned during the study that the number could not be exact because it was based only on a small amount of events. The 95%CI is therefore unfeasible. 56.4 percent to 913%. up to 91.3 percentage.

Although it is slightly shorter than the original, it is nevertheless quite broad. In ideal cases, it should be approximately 10 percent.


In the preprint, 12 percent reported moderate side effects from Covaxin. The vaccines were not linked to any deaths, but 0.5 percent experienced serious side effects.

Ninety-nine participants suffered serious adverse effects (AEs). There were 39 reported AEs in the treatment group, and sixty for those who received placebo. In their paper, the researchers stated that they would monitor the health of participants up to one year following the second dose.

  • The first injection causes local pain. It occurs in the treatment arm at 3.04%, and placebo arm at 2.78%.
  • Injection pain local to the area after second injection is 1.81% in treatment arm and 1.62% in placebo arm
  • Most commonly reported adverse reactions are: These were the most frequently reported adverse reactions, according to clinicians. They included fatigue, headaches, and myalgia. One percent for both sides
  • Mild Affects: 11.2 Percent in treatment group; 10.8% placebo
  • Moderate AEs: 0.8 percent for the treatment group and 1.1 percent for the placebo
  • Serious AEs 0.3% in therapy, 0.4% for placebo

A few missing details

The preprint clearly states that safety analysis is done based on the participation of all participants in the study, which includes 25,798 people who signed up. The preprint also indicates that the final analysis revealed a total of 24,419 participants. This is the ethically responsible choice.

However, 1 379 of the participants did not participate in the effectiveness analysis. This is most likely due to the fact that they chose out, died or withdrew permission to be part in this trial. This issue is not covered in the report, but it contains a flow chart (see more below).

Patients with asymptomatic Covid-19 It has been shown that Covaxin provides 63.6% of the protection needed in accordance with the effectiveness data.

A safety study found that Covaxin adverse effects were very similar to placebo. 12 percent experienced known adverse effects. Less than 0.5% experienced serious adverse reactions.


In India, 25 sites were used for Phase 3 clinical trials of Covaxin. This was an event-driven analysis of symptoms for Covid-19 in 130 patients, which was published two weeks after receiving the first dose.

24 people in the vaccination group were observed, and another 106 were administered placebo doses.

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