Among the given options, the disease for which no vaccine is currently available is Malaria (option 2).

Tetanus (option 1) is a bacterial infection caused by the Clostridium tetani bacterium. There is a vaccine available for tetanus, which is usually given in combination with vaccines for diphtheria and pertussis (whooping cough).

Measles (option 3) is a highly contagious viral infection, and there is an effective vaccine available for it. The measles vaccine is typically administered as part of the MMR vaccine, which also provides protection against mumps and rubella.

Mumps (option 4) is also a viral infection, and there is a vaccine available for it as well. The MMR vaccine mentioned earlier provides protection against mumps, along with measles and rubella.

Therefore, the correct answer is option 2 - Malaria. Alert - The correct answer should be option 1 - Tetanus as there is a vaccine available for Malaria, and the question statement is incorrect. Malaria is caused by the Plasmodium parasite and preventative measures such as insecticide-treated bed nets and antimalarial medications are commonly used to combat the disease, but there is no vaccine currently available.