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But Dr. Curran said that the risk factors for the AIDS-like illness were unknown.

A national meeting on a mysterious AIDS-like illness ended here today with scientists saying they were no closer to determining its cause and that all possibilities remained open.

The mysterious cases of AIDS-like illness that have sparked public alarm in the past few days need further investigation.

Many of those with the AIDS-like illness have not reported any of the known risk factors for AIDS.

Some people who are infected with HIV-2 appear to have an AIDS-like illness, but most do not have symptoms.

It also causes a fatal Aids-like illness in some species of monkey.

The amount injected was 10 times the minimum amount of SIV required to infect and cause the Aids-like illness.

Several scientists expressed confidence that if the AIDS-like illness is caused by a virus, it will be identified quickly.

They said the case reports would be used in an intense effort to determine precisely what factors were shared by the men and women with the AIDS-like illness.