this post was submitted on 24 Feb 2024
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The race for next generation vaccines is steadily heating up now. And this month, we’ve passed a major milestone: The first data suggesting that an already-authorized nextgen vaccine could outperform the BNT/Pfizer vaccine – with its manufacturers ramping up production facilities for potentially wide distribution in the next year or so.

Most vaccines that reach first-in-human trials don’t make it all the way to major regulator approval. The odds improve, though, for those that make it to mid-stage trials (phase 2). On top of that, there’s a lot of variation in effectiveness between vaccines – so a good range of approaches reaching that mid-stage increases the odds of having much better vaccines.

Though it’s not going at the blistering pace of the early pandemic, the scene is encouraging now. The number of next generation vaccines moving past first-in-human trials is into double digits. With another 2 pancoronavirus vaccines starting clinical trials this month, there’s even a handful of vaccines reaching the early stage at least in this tough category. And the body of clinical evidence seems to be growing steadily, too: We’ve been getting at least some results for an average of 2 clinical trials a month for the last 6 months.

It’s still early days in many ways, though. Even for late-stage trials, most of the efficacy data is for signs of immunity only. We don’t know critical things, especially whether or not there will be mucosal vaccines that can make a major – and lasting – impact on getting and transmitting infection in people. But at least it looks as though more durable boosters are on the horizon.

There’s a lot to get to this month for all types of vaccines, including news from clinical trials for 3 vaccines. This update starts with news from Project NextGen, with funding for another mini-efficacy trial for a mucosal vaccine. After that, I have recent results broken down into 3 categories of next-generation Covid vaccines (definitions below).

News from US Project NextGen

A fourth vaccine received funding in late January – for a phase 2b clinical trial for the oral vaccine from Vaxart. As with the others, the trial is to be for 10,000 participants. This vaccine has released phase 1 trial results, as well as a press release for phase 2 in 2022. The vaccine was later adapted for variants, and it was reportedly on hold as they were developing a pancoronavirus vaccine. (Records in my collection for this vax here.)

This brings the number of Project NextGen-funded trials to 5.

New preclinical results for mucosal vaccines

I’ve added 7 preclinical reports on results for mucosal vaccines to my collection since the last update. These include:

  • sCPD9 from RocketVax and Freie Universität Berlin: This is an intranasal live-attenuated vaccine. This study tested the effectiveness of preventing transmission of strains of Omicron among non-primates, comparing the intranasal RocketVax vaccine to the BNT/Pfizer vaccine.
  • Ad5.SARS-CoV-2-S1 from Gaphas Pharmaceutical and University of Pittsburgh: This is an intranasal viral vector vaccine. This study tested an Omicron-adapated booster in non-primates.
  • ChAd-SARS-CoV-2-BA.5-S from Washington University of St Louis (USA): This study includes versions of the intranasal viral vector vaccine further developed by Bharat Biotech in India and authorized there as iNCOVACC, tested in non-primates: An adaptation for the BA.5 strain of Omicron, compared to the original form, the adapted version alone, and a bivalent version (including both).
  • Unnamed vaccine from Pennsylvania State University (USA): This is an intranasal protein subunit vaccine, studied in non-primates.
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