How Dangerous Is the Flu?
Despite scary headlines, the absolute risk of severe outcomes from influenza are low for most people, and yes that includes even those who did not get the vaccine. In a typical season, healthy children over the age of 5 who get the flu and are unvaccinated are hospitalized at a rate of about 0.25%. This number is lower for vaccinated children, but it still means that even without the vaccine, a healthy kid who catches the flu probably has a ~99.75% chance of not ending up in the hospital. Babies and toddlers have higher hospitalization rates than older kids, and healthy adults have a lower risk. Adults 65 and older have the highest absolute risk--even without underlying conditions, an unvaccinated adult over the age of 65 has as much as a 1-2% chance of being hospitalized if he/she gets the flu. The risk of hospitalization goes down with the vaccine for every age group. Even with hospitalization, the risk of death from the flu is very low. For all hospitalized kids, about one in one thousand will die, and most of these will have an underlying condition. In adults older than 65, the death rate of those hospitalized can be as high as 10%.
My take: For most healthy kids and adults, flu is unlikely to lead to hospitalization, and death is very rare, but the risk rises meaningfully with age.
Is the Flu Vaccine Dangerous?
I can't find any credible evidence that the flu vaccine causes neurodevelopmental harm, though parents are understandably concerned because some formulations can contain thimerosal, a mercury-based preservative. Nowadays, most flu shots in the U.S. are thimerosal-free, so this exposure is largely avoidable. The vaccine may also contain trace amounts of formaldehyde or antibiotics used to prevent contamination, but these are present at levels far below those known to cause harm. Guillain-Barré syndrome occurs after flu vaccination at a rate of about one per million, which is lower than the risk of GBS following influenza infection itself, so I don't find this to be a meaningful concern. Personally, I have a hard time getting fully on board with a vaccine whose effectiveness varies widely year to year, especially given how much the vaccination push feels driven by pharmaceutical profit rather than individual risk-benefit nuance.
My take: I don’t think the flu vaccine is likely to be harmful, but from a risk perspective, my read of the science supports it most strongly for older adults and people with chronic health conditions.
What About Other Vaccines?
This is a slight tangent, so I'll be brief: If someone is unvaccinated and infected with diseases like measles or polio, they have a far higher risk of severe, permanent, or life-altering outcomes on a per-infection basis than they do if they catch the flu. My kids are fully vaccinated because my own risk-benefit analysis of routine childhood immunizations clearly landed on the side of the vaccine versus the diseases they prevent. And these vaccines are also far more effective than the annual flu shot.
My take: While the flu vaccine is a reasonable, low-risk choice for many people, it does not carry the same urgency or stakes as vaccines that protect against much more dangerous infections.
Is Tamiflu Good Stuff?
Antiviral medications like Tamiflu and Xofluza can reduce flu severity and duration somewhat (when started early), and as with the vaccine, they are most clearly beneficial for higher-risk groups like older adults. Tamiflu may reduce flu complications, but it also commonly causes nausea and vomiting and, very rarely, neuropsychiatric side effects in children. Also, its formulation includes standard pharmaceutical additives like dyes and synthetic fillers. Xofluza is a newer, single-dose antiviral that appears similarly effective and seems to have fewer GI side effects. This one comes with some resistance concerns, though, and a lack of long-term data.
My take: While I think these antivirals can be reasonable tools for higher-risk adults, I personally would not give them to my kids and don’t see them as necessary for most healthy people. (Full disclosure: I have taken Tamiflu to try to get better from the flu slightly faster because I hate being sick.)
What Good Stuff Works to Treat Flu?
When it comes to natural remedies for flu symptom improvement, the evidence supports a small but real role for a few basics. Zinc can modestly shorten the duration. Saline nasal rinses and saltwater gargling help mechanically reduce viral load in the nose and throat. Elderberry has some clinical evidence suggesting it may shorten the duration and intensity of flu symptoms. Herbal options like Umcka also have clinical trial support for reducing symptom severity and duration when used early.
My take: None of these natural remedies prevent or cure the flu, but they can meaningfully support the body’s response.
What Natural Remedies Are Bogus?
I know people swear by homeopathic products like Oscillococcinum, but I cannot find any well-designed studies that suggest that it performs better than placebo. Echinacea has been extensively studied with inconsistent and mostly unimpressive results, although I still think it's possible that a high-quality formulation could be useful. Garlic, colloidal silver, and essential oils all lack credible clinical evidence for flu prevention or treatment, at least that I can find.
My take: Homeopathic and essential oil flu remedies lack good science to back them up, but I know a lot of smart people who swear by them.
Should I Lower the Fever?
Fever is part of the body’s immune response, so it makes intuitive sense that we should let a fever "run its course" to fight a virus. However, randomized trials in viral infections (including influenza) generally find no difference in recovery time, complications, or viral clearance between people who treat fever and those who don’t. And sometimes, taking a fever reducer can improve sleep and hydration, which may support recovery.
My take: I can't find strong evidence that letting a fever “run its course” confers a meaningful advantage for myself or my kids, but I only use it to improve comfort rather than treating every fever we get.
How Can I Make My Immune System Stronger?
When it comes to making the immune system better able to fight off flu if you’re exposed, the strongest evidence still supports fundamentals like sleep, nutrition, movement, and stress management. I also take a daily vitamin D, mushroom powder, colostrum, a probiotic, and high-polyphenol olive oil. (Vitamin D supports normal immune function; mushroom powders and colostrum may support mucosal immunity; probiotics strengthen the gut barrier function, which matters because a significant portion of the immune system is tied to the gut; polyphenols in high-quality olive oil help lower baseline inflammation and support immune resilience.) Also, coffee is one of the largest sources of dietary antioxidants in many adults’ diets, and compounds like chlorogenic acids are associated with lower baseline inflammation. And tea contains catechins and theaflavins that have demonstrated antiviral and immune-modulating effects in lab and small human studies, with some evidence of reduced respiratory infection risk with regular consumption.
My take: I don’t think of any of these as shields against flu or other illness, but rather as baseline supports layered on top of the obvious, boring stuff like getting good sleep and eating veggies.
