Vaccines can prevent 23 viruses and two types of cancer, and more vaccines are in the works, including one for HIV, the virus that causes AIDS. Yet, despite these advances, many people choose to avoid getting these vaccinations for themselves and for their children. VOA's Carol Pearson has more.
The European Space Agency has released an updated catalogue of more than 1.7 billion stars in our galaxy, as well as other celestial bodies, such as exoplanets, asteroids and quasars. The new data gives astronomers an unprecedented three-dimensional map for studying the origin of the universe and searching for habitable planets. VOA's George Putic has more.