text: CLOSE The Caller-Times chatted with actor Lou Ferrigno and he told us a little about himself and what fans can expect at the second annual Corpus Christi Comic-Con this weekend. Meagan Falcon/Caller-Times 
   
   Lou Ferrigno attends The Hollywood Show held at Westin LAX Hotel on Feb. 10, 2018 in Los Angeles, Calif.\ (Photo: Albert L. Ortega, WireImage) 
   
   Lou Ferrigno is looking a little green. 
   
   “The Incredible Hulk” star revealed on Instagram he was hospitalized this week after he went to get a pneumonia shot – presumably a vaccine – and ended up with fluid in his bicep. He posted an unhappy looking snap in a green hospital gown, warning his 87,000 Instagram followers about his condition. 
   
   “Went in for a pneumonia shot and landed up here with fluid in my bicep,” he wrote Thursday. “I’ll be ok but it’s important that you keep an eye on who’s giving the shot and make sure they not only swab the spot correctly but that you watch the needle come out of the package.” 
   
   The 67-year-old actor’s fans crowded his Instagram comments field with well wishes, sending him their concerns. 
   
   One fan wrote, “Lou! Please get better very soon. You're such an inspiration to me and for so many!” 
   
   On Friday, Ferrigno revealed he was doing better. On Thursday night after he was released from the hospital, he attended a Smash Global MMA event in Los Angeles. 
   
   “What a great night with @smashglobal and @steveorosco,” he wrote. “Really great getting to hang out with some old friends as well @dolphlundgren. Happy I made it out of the hospital in time.” 
   
   Read or Share this story: https://www.usatoday.com/story/life/people/2018/12/14/hulk-lou-ferrigno-hospitalized-after-pneumonia-shot-gone-wrong/2314320002/ ||||| Tweet with a location 
   
   You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more ||||| Lou Ferrigno is recovering after a pneumonia vaccination went wrong. 
   
   The Incredible Hulk actor, 67, shared the news to his social media accounts on Wednesday, revealing that he ended up in the hospital after he was allegedly incorrectly administered a pneumonia vaccine. 
   
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   “Went in for a pneumonia shot and landed up here with fluid in my bicep,” he tweeted alongside a photo of himself lying in a hospital gown with IVs in his arm. 
   
   “I’ll be ok but it’s important that you keep an eye on who’s giving the shot and make sure they not only swab the spot correctly but that you watch the needle come out of the package,” he advised. 
   
   Lou Ferrigno's tweet Lou Ferringo/Twitter 
   
   He also shared the news to his Instagram account, adding the hashtags “#neveradullmoment #tips #shots #hospitalvisit #louferrigno #illbeok” 
   
   Reps for Ferrigno did not immediately respond to PEOPLE’s request for comment. 
   
   While it is unclear what specific shot was given to Ferrigno, there are two types of vaccines that fight against pneumonia, according to the Center for Disease Control and Prevention (CDC). 
   
   Lou Ferrigno Axelle/Bauer-Griffin/FilmMagic 
   
   PCV13 and PPSV23 are both recommended for adults who are 65 and older in order to avoid contracting infections from pneumococcal diseases, such as meningitis, bloodstream infections, pneumonia, and ear infections. 
   
   Though both shots can bring on mild side effects that often go away on their own, only PCV13 has been reported to cause swelling at the injection site, the CDC said. 
   
   Lou Ferrigno as "The Incredible Hulk" Silver Screen Collection/Getty 
   
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   Despite Ferrigno advising his fans to be extra cautious when receiving shots, the CDC reports that the United States has the safest and most effective vaccine supply in its history. 
   
   In addition to playing The Hulk, Ferrigno most recently picked up roles in several films including The Avengers in 2012, Star Trek Continues in 2014, and Enter the Fire in 2018. He also has several projects lined up for 2019, according to his IMDb page. 
   
   RELATED VIDEO: Lou Ferrigno and Erik Estrada Reminisce About Being 70s Stud 
   
   Aside from his acting career, Ferrigno has spent years dedicated to bodybuilding, which he officially retired from in the 90s, and co-founded his family’s fitness program, Ferrigno Fit, with his daughter Shanna. 
   
   His reputation in weightlifting and bodybuilding secured him the job of training Michael Jackson ahead of his comeback tour in 2009. ||||| Tweet with a location 
   
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target: – The Incredible Hulk was feeling pumped up this week—but with IV fluid, not testosterone-induced rage. On Wednesday night, Lou Ferrigno posted on social media a picture of himself wearing a green hospital gown (naturally) and hooked up to an IV in a medical center in Santa Monica, Calif., noting he "went in for a pneumonia shot and landed up here with fluid in my bicep." The 67-year-old actor implied someone administered the shot (apparently a vaccine, USA Today notes) the wrong way, warning others to "keep an eye on who's giving the shot and make sure they not only swab the spot correctly but that you watch the needle come out of the package." Although Ferrigno didn't say what shot he received, People notes that, per the CDC, there are two types of pneumonia vaccines, both suggested for older adults and one of which can produce swelling at the site where the shot was given. All appears to be well now with the star: On Friday morning, he tweeted a picture of himself hanging out with Rocky actor Dolph Lundgren and others at an MMA event the night before in Los Angeles. (Ferrigno's wife was one of many who lobbed accusations against Bill Cosby.)