Disclosed are methods of treating a patient exposed to MTV. Also disclosed is a purified cDNA encoding an MTV transition protein peptide chain. Also disclosed is a vaccine containing an MTV transition protein. A further version of the invention is a vaccine comprising MTV polypeptides coupled to a carrier protein. MTV may be treated by providing an MTV vaccine with an MTV transition protein; and, administering said vaccine. In further instances, the MTV vaccine is administered with an antiretroviral medication.

Disclosed is a vaccine containing an MTV transition protein. A further version of the invention is a vaccine comprising MTV polypeptides coupled to a carrier protein. MTV may be treated by providing an MTV vaccine with an MTV transition protein; and, administering said vaccine.

Disclosed are methods of treating a patient exposed to MTV. Also disclosed is a purified cDNA encoding an MTV transition protein peptide chain. Also disclosed is a vaccine containing an MTV transition protein. A further version of the invention is a vaccine comprising MTV polypeptides coupled to a carrier protein. MTV may be treated by providing an MTV vaccine with an MTV transition protein; and, administering said vaccine. In further instances, the MTV vaccine is administered with an antiretroviral medication.

Disclosed is a vaccine containing an MTV transition protein. A further version of the invention is a vaccine comprising MTV polypeptides coupled to a carrier protein. MTV may be treated by providing an MTV vaccine with an MTV transition protein; and, administering said vaccine.

The present disclosure provides recombinantly manufactured fusion proteins comprising a HERV-K (HML-2) Env protein fragment or an analog thereof linked to a human Fc fragment. Embodiments include the administration of the fusion proteins to patients having a disease or a disorder with the intention of mitigating and/or reducing the duration of symptoms associated with the condition or disease (for example but not limited to muscular weakness, paralysis and respiratory failure), and/or preventing symptoms associated with the condition or disease, for example, by preventing motor neuron degeneration and cell death in ALS patients associated with the condition or disease. Accordingly, treatment generally means both therapeutic treatment and prophylactic or preventative measures. Improvement after treatment may be manifested as a decrease or elimination of such symptoms, e.g., by a decrease or elimination of symptoms associated with ALS, and/or by a decrease in the duration of such symptoms.

The present disclosure provides recombinantly manufactured fusion proteins comprising a HERV-K (HML-2) Env protein fragment or an analog thereof linked to a human Fc fragment. Embodiments include the administration of the fusion proteins to patients having a disease or a disorder with the intention of mitigating and/or reducing the duration of symptoms associated with the condition or disease (for example but not limited to muscular weakness, paralysis and respiratory failure), and/or preventing symptoms associated with the condition or disease, for example, by preventing motor neuron degeneration and cell death in ALS patients associated with the condition or disease. Accordingly, treatment generally means both therapeutic treatment and prophylactic or preventative measures. Improvement after treatment may be manifested as a decrease or elimination of such symptoms, e.g., by a decrease or elimination of symptoms associated with ALS, and/or by a decrease in the duration of such symptoms.