Explain why the individual who is a carrier for hbv is considered a threat to public health.

HBV (hepatitis B) is a viral infection that attacks the liver.  It can cause acute or chronic disease and it is transmitted through contact of blood or other body fluids of an infected person.  

An infected person can be transmitted through birth, sharing of needles, sharing of common household personal hygiene items, direct contact with an open or bloody sore, or through sexual contact.

It is a hidden treat because those who have hepatitis B can transmit it to another (blood/other body fluid); if they know they have it or not.  

Acute hepatitis B is short-term (6 months after being exposed) and they can become immune and can not get infected again; but it can lead to chronic hepatitis B (depends on how healthy the person is).

Chronic hepatitis B can cause liver damage, cirrhosis, liver cancer, and death.  

Explanation:

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

hope this !

the animal that would be cutest if scaled down to the size of a cat? elephant