poses a different threat. on the vaccine front, moderna says it will seek authorization for its omicron-specific vaccine this summer, plus a team in texas thinks they have come up with yet another vaccine that could be a game changer not just in the u.s. but for the rest of the world. morgan chesky has that story now. >> reporter: at texas children's hospital in houston, there is much more than meets the eye because past the exam rooms inside this lab lie what is they believe to be the potential silver bull let for taking down covid-19. >> our lab is the united nations of science. >> reporter: a team of doctors led by dr. peter hotez and dr. elina mattazzi dedicating their careers to fill a vaccination gap. >> delta rose out of an unvaccinated population in india the beginning of last year, then omicron rose out of an unvaccinated population out of southern africa. mother nature is telling us what's going to happen. as long as we refuse to