Why would a vaccine be useful? It gives your body lifetime immunity for every virus that it comes in contact with.
It kills all of the viruses that are currently in your body.
It allows your body to form an immune response and memory cells to a weakened form of the virus incase is encounters the same virus again.​

One does not belong why? ice, gold ,wood ,diamond and table salt

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions