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HR 3978 117th Congress House

Vaccine TROL Act of 2021

Official title: To make it unlawful to send a demand letter in bad faith for a patent relating to COVID-19 related products, and for other purposes.

Introduced: June 17, 2021 See on congress.gov
Commerce Cardiovascular and respiratory healthCivil actions and liabilityEmergency medical services and trauma careFraud offenses and financial crimes
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Infectious and parasitic diseasesIntellectual propertyState and local government operations
This bill died when the 117th Congress ended
It never became law before the 117th Congress (2021–2022) adjourned, and bills don't carry over to the next Congress. It would have to be reintroduced. You can still save it for reference, but it won't receive updates.
 Everywhere this bill has been 3 steps
Introduced
In committee
Reported out
Passed House
Passed Senate
To President
Became law
Jun 18, 2021
Referred to the Subcommittee on Consumer Protection and Commerce.
Jun 17, 2021
Referred to the House Committee on Energy and Commerce.
Jun 17, 2021
Introduced in House
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 Latest action June 18, 2021

Referred to the Subcommittee on Consumer Protection and Commerce.

 Plain-English summary Congressional Research Service

Vaccine Targeting Rogue and Opaque Letters Act of 2021 or the Vaccine TROL Act of 2021

This bill prohibits sending bad faith patent demand letters concerning a product relating to COVID-19 during the declared public health emergency.

A patent demand letter is a written communication claiming that the recipient may be liable for patent infringement. Bad faith means making knowingly false or misleading statements, making claims with reckless indifference for the truth, or omitting information with the intent to deceive.

Bad faith representations shall include false or misleading claims about the sender's right to assert a patent and whether lawsuits have been filed. They also include making written demands for compensation for invalid patents or to demand compensation without identifying the ultimate parent entity of the letter sender.

Under this bill, a patent demand letter related to COVID-19 is presumed to have been sent in bad faith if the sender fails to respond within 10 business days of receiving a request by the letter recipient for (1) certain information required by this bill, or (2) the patent claim that the sender reasonably believes is being infringed.

The sender shall have an affirmative defense that it acted in good faith by proving that its misstatements or omissions were unintentional and that it made an error in spite of procedures to avoid such errors.

The Federal Trade Commission and state attorneys general may bring actions to enforce these provisions.

 Related & companion bills 1
 Bill text 1 version

Source documents hosted by congress.gov.

 Committees of jurisdiction 2
Cite this page click to expand
APA
U.S. Congress. (2026). H.R. 3978: Vaccine TROL Act of 2021. 117th Congress. Open America. https://openamerica.io/bill/117-HR-3978/
MLA
"H.R. 3978: Vaccine TROL Act of 2021." 117th Congress, 2026, Open America, https://openamerica.io/bill/117-HR-3978/.
Bluebook (legal)
H.R. 3978, 117th Cong. (2026), https://openamerica.io/bill/117-HR-3978/.
Markdown link
[H.R. 3978: Vaccine TROL Act of 2021](https://openamerica.io/bill/117-HR-3978/)
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