Sentence 1: Pablo had several health issues. 
 Sentence 3: Pablo had to have his leg amputated 
 Sentence 4:  He was given a prosthetic but he was nervous about using it 
 Sentence 5:  Pablo worked with a physical therapist and learned to walk again 
 Option 1: He learned he had a bad infection in his leg. 
 Option 2: Luckily, they caught everything in time so there were no lasting effects.