health insurance. >> it was nearly impossible for me to think about leaving. i don't know how i do it. i just make it through the day. >> reporter: the u.s. government recognizes long covid as a disability and patients can apply for assistance but it can take months and some long haulers say they've been denied. >> it's been a catastrophe for us. >> reporter: laurie biddel just applied for disability and is awaiting an answer. she and her husband have used up their savings and retirement funds just to pay the bills. >> honestly, i am terrified i'll never be able to go back to work. >> reporter: many of the long haulers are some of the more severe cases so these doctors acknowledge it is hard at this point to say exactly how many patients are out of work. the latest estimate reflects the concern from doctors about the long-term neurological problems their patients are facing. not just the ones who have left their jobs but also, jake, the ones who may be suffering in silence at work.