They are being pursued, just not given the same resources as the emergency effort to get the original vaccines approved: - https://www.biorxiv.org/content/10.1

They are being pursued, just not given the same resources as the emergency effort to get the original vaccines approved: - https://www.biorxiv.org/content/10.1101/2022.01.24.477597v1 https://www.biorxiv.org/content/10.1101/2022.01.24.477597v1 - https://www.science.org/doi/10.1126/science.abg9857 https://www.science.org/doi/10.1126/science.abg9857