<h2>
Answer:</h2>
<h3>1. Hepatitis B </h3><h3>2. Levels of circulating antibodies against a certain antigen.</h3>
<h2>
Explanation:</h2>
<h3>Hope its help</h3>
All the above is correct.
UM- LFJKAHFAJF SIS WANTS US TO ANSWER ALL OF THEM SKSJSJJS
Answer:
between c. 95,000 and c. 20,000 years
Explanation:
