"At such a level of efficacy, if we get there, we can protect a lot of lives in the people at the highest risk, and so, we will consider filing for an EUA for a very limited population", Bancel said.
Temporary pauses in clinical trials aren't unusual.
A handful of vaccines, including those from Pfizer Inc and AstraZeneca, are also being tested in large studies.
The Serum Institute of India has received Indian regulatory approval to resume local trials and intends to restart in the next day or two, according to a person familiar with the matter who asked not to be named because the regulator's decision isn't public.
It is looking to invest Dollars 6 billion to secure access to a diverse portfolio of vaccine candidates, now at different stages of clinical trials around the world.
EC President Ursula von der Leyen said: "With today's contract with Sanofi-GSK, the European Commission shows once again its commitment to ensuring equitable access to safe, effective and affordable vaccines not only for its citizens but also for the world's poorest and most vulnerable people".
Moderna's vaccine candidate - mRNA-1273 - is nearing the finish line in its push to enroll 30,000 individuals in a late-stage trial of a novel coronavirus vaccine. Either way, "of course, from my point of view, it is better they limit their activity to only clinical trials, as we said from the beginning".
The poll surveyed 10,093 adults between September 8 and 13, around the time pharmaceutical company AstraZeneca announced it was temporarily halting trials after a participant suffered a possible neurological side-effect.
More than a month after becoming the first country to approve a coronavirus vaccine, Russian Federation has yet to administer it to a large population outside a clinical trial, health officials and outside experts say.
Results from two early‐phase non‐randomised vaccine trials for Sputnik V in a total of 76 people found that two formulations of a two‐part vaccine had a good safety profile with no serious adverse events detected over 42 days, and induce antibody responses in all participants within 21 days. "More than 55,000 volunteers have applied to take part in post-registration trials", the media statement said. "The trial is led by ICMR-National AIDS Research Institute", Health Minister Harsh Vardhan said in Parliament.