Used other than as an idiom: go into; to enter.(verb)
To get involved in.(verb)
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Use "go into" in a sentence
"This increases the likelihood that the immune system will go into erratic overdrive, that mistakes will be made and autoantibodies will attack the body itself."
"It turned out that the heavy steroids his rheumatologist had prescribed for his arthritis had eaten through the sutures his stomach surgeon had sewn in, and the peritonitis that ensued caused his body to go into shock and his heart to arrest."
"Indeed, the number of cell interactions that go into one immune response—say, fighting off the microparticles that come out of a blast of diesel exhaust—would take up three consecutive chalkboards to show in its entirety."