| B C 3 | | 1981 1983 | HIV | | | | | B | B B | B | | C | C 3% | B C | | 1 B C | | 2 | | B C | | | | 3 B C | | | | | | | ① | | | ② | | | ③ | | ④ | | ⑤ | | B | B | | B | | | B C | | | | B | C | B C | | | |