¿Por qué quedamos inmunizados contra el Sarampión y no contra la gripe?

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

Acell goes through cellular respiration and produces atp which it then uses to move a molecule across the cell membrane. how does the energy in the original glucose molecule change during this process? (2 points)

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.