<span>the type of white blood cells is produced in the thymus and destroys the cell membranes of bacteria is: B cells or also known as B. lymphocytes
B cell is a type of white blood cell of the lymphocyte subtype. One of its main function is to create a component in adaptive immune systems that made the body capable to became more resistance towards a phatogen after previously exposed to it</span>
4th one should be the correct answer if I am not mistaken
Answer:
some blood containing the virus remains in theneedle and is injected in another personwhen the needles are shared
Explanation:
