The measles, mumps and the rubella vaccine [MMR] is usually given to children twice before the age of 7. The first dose is given between age 12 to 15 months while the second dose is given between the ages of 4 and 6. Many people link the MMR vaccines to autism because of a scientific publication that was published in 1989. The research study reported a link between autism and MMR vaccination. This publication has been discredited.
Also, the period of during which the first dose of the vaccination is usually given coincides with the time when parents usually notice developmental abnormalities in their children.
<span>The temperature in the laboratory
The position of the Bunsen burner
The amount of air that mixes with the gas stream
these can all have an affect on the intensity of the reaction.
I hope I was helpful.</span>
B
I think sorry if I’m Wrong
Hope this helps
The term is called a theory.
In scientific investigation, a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
<span>T lymphocytes are to the <u>thymus</u> as B lymphocytes are to the <u>bone marrow.</u><u /> In mammals, lymphocyte development occurs mainly on the central lymphoid glands (i.e. thymus for T cells and bone marrow for B cells).
<em>ANSWERS: thymus, bone marrow</em></span>
