Исследования этой болезни длятся уж

Исследования этой болезни длятся уже больше года, и было принято решение продлить их ещё на год.

Results (English) 1:

Studies of this disease has already lasted more than a year, and it was decided to extend them for another year.

Results (English) 2:

Research on this disease has been going on for more than a year, and it was decided to extend it for another year.

Results (English) 3:

Research on the disease has been going on for more than a year and it has been decided to extend it for another year.