More than 650 miles away in South Carolina, Jeb Teishman got the phone call no parent wants to get."His cousin and roommate (were) calling me just before midnight that he couldn't wake Brent up," Dr. Teishman said as he fought back tears.Teishman, a retired pediatrician, had just talked to his 29-year-old son Brent who was battling the flu. Brent was living in Jeffersonville at the time."We talked, I told him to stay hydrated, take some Tylenol or ibuprofen, give this another day to blow over, and I talked to him the next day and he was a little better, his fever went down," Teishman said.But Brent did not recover.Now three years after his death, his dad — a pediatrician for more than 30 years — is urging others to get the flu shot."As a pediatrician, I have always been a fierce advocate of vaccination of all kinds. Until COVID, influenza was the number one vaccine-preventable cause of death in this country and I made sure my family got their flu shot every year. You know, when they are 29, you can't drag them by the hand and bring them to the office to get them to get their vaccine. Brent said it was on his to-do list and he never got around to it," Teishman said.Dr. Kenneth Anderson, chief medical officer at Baptist Health, is encouraging everyone to get the flu shot. That's as doctors fear a rise of COVID-19 and flu cases this winter."It is important for all of us to get our yearly flu shot. As a pulmonologist in the ICU, we would have sick people every year in the ICU from flu, usually more elderly people, occasionally (a) young person," Anderson said.It's a pain all too real for Teishman."Brent's legacy is my advocacy for vaccination. I am working with two different vaccine advocate organizations to get the message out that it is really important to get vaccinated," Teishman said.And his friends and fellow health professionals are too.Brent's picture still hangs in the exam rooms where he once worked, a constant reminder to encourage all patients to get their flu shots.