1 Babies under 6 months of age. 2  Although the vaccine is not harmful to babies less than 6 months old, it does not work. 3  If your child has a serious allergy to thimerosal (a preservative in contact lens solutions and the flu vaccine), a thimerosal-free vaccine should be given.f you have children younger than 5 years old or who have health complications, everyone living in the house should get a flu shot. This is especially important if you have children under 6 months old or a member of your household who is pregnant. Pregnant women should be immunized.
The Cambrian Period is the first geological time period of the Paleozoic Era (the âtime of ancient lifeâ). This period lasted about 53 million years and marked a dramatic burst of evolutionary changes in life on Earth, known as the Cambrian Explosion..
The Cambrian Period (543 to 505 million years ago) is the first time period of the Paleozoic Era.It is preceded by the Precambrian. The Cambrian Period opened in the aftermath of a mass extinction. During the last 100 million years of the Precambrian, a unique fauna had developed.y Laura Klappenbach. The Cambrian Period (543 to 505 million years ago) is the first time period of the Paleozoic Era. It is preceded by the Precambrian.