As the doctor got to his lab, he began searching for his notes in a panic. He needed to find them, and fast. Who knows how long this Virus could take to affect him. He hadn't even thought of creating a vaccine for himself. He also didn't think it would be sent back to him, especially so quickly. As he continued rummaging through his notes, he felt a slight tingling sensation flow through him.
"Oh shit!" he shouted out loud. "It's started now!"
Once the drug had started affecting him though, he wouldn't be able to stop it. He was going to begin to regress soon. He buried his head in his hands, and sat down on his desk with a thud. He was just going to wait until it was all over. He was in his mid forties, slightly balding, and had a few grey hairs here and there.
He felt the tingle again. He figured if he's going to regress from the virus, he may as well go to the mirror to see the changes. Nothing appeared to be different on him at the moment. He was still the same height and weight, and his hair was still a bit grey. He made his way to the full length mirror in his lab. He looked at himself, and man was he happy at this moment. His hair had thickened to it's once youthfulness. He still looked the same to himself mostly. But he noticed creases and wrinkles on his face started to smooth out! He was making his way to his early thirties now. He knew he had better enjoy this, because it wasn't going to last long at all. As he foolishly admired himself in the mirror, he watched as he regressed further, becoming twenty five. His height remained the same, but he lifted his shirt and watched as his slight pot-belly started to disappear. He became the proud, muscled stud he had once been. His hair regained it's gorgeous chocolate brown youthfulness.
He felt like he had so much energy! He could run a mile and come back for more several times over! He was glad to have his old body back, but he frowned as he felt a powerful tingle and watched himself regress again. The tingling was becoming stronger, as was this energy he was receiving. He watched as he regressed down from twenty five to around eighteen now. He had his six pack abs back finally! Now came the humiliating part. He shrunk a couple of inches, making him 5'8". He seemed to be getting hornier at this point in time though. Maybe turned on by his own humiliation?
He sat down on the counter and continued to watch himself in the mirror. He didn't want his pants to fall around his ankles, as he knew what was soon to come. He stared at his hands, and watched as they visibly shrunk before his eyes! His arms shortened a little as well. He was making his way down to the age of sixteen. His face softened, and began to lose hair. It retracted into his body, and the tingling from that spread to his legs and groin. He noticed that he was so horny, and realized that if he didn't jack off soon, he wouldn't be able to do it for a long while. He began to jack himself off, as he watched himself shrink again. He was now 5'4", had a smooth baby face as he became fifteen. His shirt sleeves were getting in the way of his hand and his dick. This only turned him on even more. Then he watched as his pants became baggy in milliseconds. His socks were becoming so large now that they hung off his feet. He used to be able to touch the ground with his feet while he was sitting on the counter, but not anymore. His feet dangled in the air, as his feet slimmed and shortened, causing his socks to fall off to the floor.
His shirt and pants now looked several sizes too big for his diminishing frame. As he continued jacking off, he came close to a climax, but he wanted to drag it out as much as he could. He shrunk again, and was now down to 4'8", and then his body turned from muscle to skinny almost instantly. He figured he wouldn't be able to go any more without an ejaculation, seeing how young he was now. He finally climaxed all the buildup from the regression, and shot it all over himself. His shirt was covered in cum.
He decided to go closer to the mirror to look at all the changes. He got up off the counter, covered in cum, and walked right in front of the mirror. His pants and underwear slid down his legs to his ankles. He looked to be around thirteen years old. He was so caught up in getting off, that he didn't notice the size of his dick. It was so tiny! Exactly the same size it had been when he was originally that age! He was now a scrawny, short thirteen year old boy covered in cum, with almost no body hair. He sat down on the floor and began to cry due to his backfired plan.