It's All My Fault

It all started the day I graduated from university,I graduated from biomedicine. My goal was to find a cure for "Polio",a deadly disease that my sister had. I got a job immediately after graduation because my uncle was the manager of a famous biomedicine lab. As soon as I sat down on my dest I started testing the substances to find the right medicine as fast as possible to help my sister before it was too late. I had sleepless nights trying to find the solution. My uncle gave me some instructions that I had to follow. Rule number one is to never enter room 132, and rule number two is to never open the drawers in his office.But one sleepless night, when no one was still in the office,I ran out of a specific green liquid which needed urgently. I went to my uncle's office to see if he had any of this substance left.I saw that one of his drawers was open,curious,I peeked inside and found a key with a keychain hanging on it.On the chain was written room 132.I knew I was f*******n to go in there but I needed that substance.I went to that room and went inside.I was was shocked to see a completely empty room with a rug on the floor.I looked closely and spotted a hidden door under the rug.I opened it and went inside.It led me to a room filled with bottles of different substances.I saw a bottle that was filled with the green substance that I needed.I took it and headed out.The next day I continued working,but when I poured the green liquid,I was surprised with its reaction to my solution.It made tiny white bubbles for a few minutes then they popped. I tested it and found out that is might be the solution that I have been looking for.I ran to my uncle's office to let him know that I would be leaving early because I found the medicine for my sister.He seemed hesitant to let me go without him testing the product but he saw the excitement on my face so he let me go.I ran to the hospital where my sister was staying.I snuck my medicine in and then told my parents that I might have found the solution.They let me try it on my sister since nothing was working on her anyway.I gave her a spoonful and told my parents I'll come back tomorrow yo see the results.At two in the morning my parents called me demanding to come as soon as possible.I ran there worried if something bad had happened.As soon as I got there I barged in and found my uncle and my parents waiting for me,then I looked at my sister,she looked...dead!I panicked and asked what had happened.My uncle asked me if I had broken into that room and I told him the truth.He yelled at me saying that my sister turned into a creature called Zincomatropulous or in other words a zombie because I didn't listen to him and I had made a new contagious disease.I fell to the ground tears streaming down my eyes.Guilt was killing me.Then suddenly, my sister woke up with yellow eyes and green skin,then a bunch of doctors barged in looking just like her.We knew that we had to run. Right now we are hiding in a secret bunker and I feel so bad and guilty for what I had done.If you have any suggestions please feel free to give me some advice because I feel so guilt and the worst part is...It's all my fault.