The whole world is affected by pandemic. what could be the reasons for its spread and what can we do to prevent it.

Reasons for the spreading of this illness is due to the fact that people are not wearing their masks, not covering their coughs and sneezing which spreads germs, and during this time coming in close contact with others. To help prevent the spread would be for us to wear masks because not only does it protect us it helps protects people from our germs. Washing hands and covering coughs and sneezes can also help tremendously as well as keeping distance between others. The sooner we all practices these basic things the quicker all of us can get back to our normal lives because almost we know almost everyone misses the normal.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

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