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, part of the Paleozoic era, produced the most intense burst of evolution ever known. The Cambrian Explosion saw an incredible diversity of life emerge, including many major animal groups alive today.ore than 17,000 species are known to have survived until the mega-extinction that ended the Permian period 251 million years ago. A predator of the Cambrian was the giant, shrimplike Anomalocaris, which trapped its prey in fearsome mouthparts lined with hooks.