The testing will also be extended to children.
Health officials in Oregon are investigating four "breakthrough cases" of individuals who contracted the coronavirus after receiving the second dose of the COVID-19 vaccine.
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The man, who was in his 40s, had a number of underlying health conditions and was a resident at a long-term care facility.
Pfizer and BioNTech's coronavirus vaccine comes in vials with six doses each. Health officials would need to use a special syringe to extract the final dose.
“This is something you certainly hope never happens, and we are working with the state to determine how it did."
To date, Chile has ordered close to 90 million vaccine doses – enough to fully vaccinate its population of 19.2 million people twice.
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The company said it expects to reduce the number of days taken to produce a batch of COVID-19 vaccines from 110 to around 60.
A new study found that AstraZeneca's coronavirus vaccine is only 10% effective against the South African variant.
The Oxford/AstraZeneca vaccine fails to prevent mild and moderate cases of the South African coronavirus strain.
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AstraZeneca said its vaccine is 76% effective after the first dose and up to 82% effective at preventing the virus after the second dose.