Within 24 to 48 hours of the first detection of the virus, state and federal animal health officials work with farms to cull infected flocks to reduce the risk of transmission. That’s followed by extensive disinfection and months of surveillance and testing to make sure the virus isn’t still lurking somewhere on-site.

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“Due to ongoing issues with the supply of eggs, we are currently limiting egg purchases to one dozen per customer, per day, in all Trader Joe’s stores across the country,” a Trader Joe’s spokesperson told CNN. “These limits will help to ensure that as many of our customers who need eggs are able to purchase them when they visit Trader Joe’s.”