Almost everyone has around a 50% chance of having a boy and a 50% chance of having a girl. What we can say is that dad's sperm determines whether a baby will be a boy or a girl. About half of his sperm will make a boy and half a girl. The sex of the baby depends on which sperm gets to the egg first.In a perfect world, it would all be up to chance.lmost everyone has around a 50% chance of having a boy and a 50% chance of having a girl. What we can say is that dad's sperm determines whether a baby will be a boy or a girl. About half of his sperm will make a boy and half a girl. The sex of the baby depends on which sperm gets to the egg first.
Because the risk of shingles increases for older adults, a single dose of shingles vaccine is recommended for people 60 years of age and older. Even those who have had shingles can still receive the shingles vaccine to help prevent repeat occurrences. The vaccine is also recommended for those that have had chicken pox.
Currently, only one dose of the shingles vaccine is recommended, but it is possible that a booster vaccination may be recommended in the future. Studies have shown that the shingles vaccine helps prevent shingles for at least four years; it is not known if it will work longer. The shingles vaccine is given as a single injection, just under the skin of the upper arm. 2  It does not matter if you receive your shingles vaccine injection on a full or empty stomach. 3  If your healthcare provider recommends it, you may get your flu vaccine at the same visit.