Students who received an approved two dose COVID-19 vaccine are not required to receive a booster until after five months from the date of the second dose. A booster will be required as soon as you become eligible regardless of whether or not classes have begun.
If a COVID-19 booster is not available in your home country and it has more than five months since you received your last dose of the two dose vaccine, you can request a temporary
Medical Exemption. You will need to submit the exemption form along with a statement from a medical professional verifying that the booster is not available to you along with the date that you will be eligible for a booster.
Please note that you will need get the booster as soon as you are eligible – whether that is before or upon your arrival in the U.S.