Soumya Swaminathan mentioned such vaccines may have benefits over the present crop as they’d be simpler to ship than injections and will even be self-administered.
Swaminathan mentioned there have been 129 completely different candidate vaccines that have gotten so far as medical trials — being examined on people — whereas an additional 194 will not be but that superior of their growth and are nonetheless being labored on in laboratories.
“This covers your entire vary of applied sciences,” she instructed a reside interplay on WHO social media channels.
“They’re nonetheless in growth. I’m positive a few of them will show to be very secure and efficacious and others could not.
“There may very well be benefits to among the second technology vaccines… clearly when you’ve got an oral vaccine or an intra-nasal vaccine that is simpler to ship than an injectable.
“In the end we’ll have the ability to select those which might be most applicable.
“If not for COVID-19, we’re going to make use of these platforms for different infections sooner or later.”
Swaminathan defined some great benefits of a vaccine being sprayed into the nostril, as occurs in some international locations with influenza vaccines.
“If there’s a neighborhood immune response then it’ll handle the virus earlier than it even goes and establishes itself within the lungs and begins inflicting an issue,” she mentioned.
The WHO has solely given emergency use authorisation to seven COVID-19 vaccines: these created by Pfizer/BioNTech, Moderna, AstraZeneca, Johnson & Johnson, Sinopharm, Sinovac and final week Bharat Biotech.
“Not one of the vaccines are 100%. No one has ever claimed that the vaccines are going to be 100% protecting. However 90% is a superb quantity of safety to have, in comparison with zero,” Swaminathan mentioned.
“Until now, with the vaccines that we’ve got permitted, there has not been any sign which has been so worrying that we have to say, effectively, we have to re-think this vaccine.”
Greater than 7.25 billion vaccine doses have been administered world wide, in response to an AFP rely.