The corona virus has changed life on Earth for our race (the human one); many have died, more are sick. Social, economic, occupational and family lives have worsened–in some cases improved, but many yearn to travel again. I hope to __ after a vaccine is approved & available.
① in abroad (This has no meaning as abroad is not a place or location)
② go abroad (describes a type of travel–a condition, a state of being, like being happy; one is abroad in the same sense as one is happy.)
③ go in abroad
The answer is number 2.