Pfizer says it is about to seek U.S. authorization for a third dose of its COVID-19 vaccine.

The company said Thursday that another shot could dramatically boost immunity and maybe help ward off the latest worrisome coronavirus mutant.

Research from multiple countries shows the widely used COVID-19 vaccines offer strong protection against the highly contagious Delta variant. But virus-fighting antibodies naturally wane.

Pfizer says early data from a company trial suggests people’s antibody levels jump after they get a third dose.

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But the filing doesn’t mean third doses would be rolled out any time soon. Public health officials would have to decide if they’re really needed.

LOOK: Here is the richest town in each state

Just saying the names of these towns immediately conjures up images of grand mansions, luxury cars, and ritzy restaurants. Read on to see which town in your home state took the title of the richest location and which place had the highest median income in the country. Who knows—your hometown might even be on this list.

LOOK: Here Are 30 Foods That Are Poisonous to Dogs

To prepare yourself for a potential incident, always keep your vet's phone number handy, along with an after-hours clinic you can call in an emergency. The ASPCA Animal Poison Control Center also has a hotline you can call at (888) 426-4435 for advice.

Even with all of these resources, however, the best cure for food poisoning is preventing it in the first place. To give you an idea of what human foods can be dangerous, Stacker has put together a slideshow of 30 common foods to avoid. Take a look to see if there are any that surprise you.