According to officials, an additional dose of vaccine is different from a booster dose.
The vaccines studied were AstraZeneca, Pfizer-BioNTech, Novavax, Janssen, Moderna, Valneva, and Curevac.
The bench was hearing various issues concerning the Covid-19 crisis and also stressed upon the need and efficacy of the booster dose for those who have been completely vaccinated.
Reviewing cases of Covid and seasonal diseases at his official residence, Ashok Gehlot expressed concern over the rise in the number of positive coronavirus cases in some districts.
The National Health Service said people in the high-risk categories have been quick to take up the offer of the booster jabs ahead of winter, with a total of 2.08 million 'top ups' administered so far
The researchers studied the convergent antibodies' ability to bind to several variants and found that they no longer bound to some.
As the global debate on booster shots gathers momentum, several scientists here said the priority must be to ensure that more people are inoculated with at least their first jab.
The twin votes represented a heavy blow to the Biden administration's sweeping effort, announced a month ago, to shore up nearly all Americans' protection amid the spread of Delta variant.
According to one official, Moderna produced inadequate data for the FDA and CDC to approve the third dose of its vaccine.
The WHO has, however, sought a two-month halt on administering booster shots of COVID-19 vaccines in view of severely constrained vaccine availability around the globe.
More than 7.3 million cases, including more than 186,000 deaths, have been confirmed across the continent and health systems are straining to provide medical oxygen and other care.
US health officials announced recommendations that Americans who received the Moderna or Pfizer vaccine get a booster shot eight months after their second dose.
'We believe clearly that the data does not indicate that boosters are needed,' Dr. Soumya Swaminathan said at a news conference in Geneva
Health officials said people who received the single-dose Johnson & Johnson vaccine will also probably need extra shots.
People have compromised immune systems for a variety of reasons, including organ transplants, cancer or other conditions.