The PREP Act and COVID-19, Part 1: Statutory Authority to Limit Liability for Medical Countermeasures
Legal Sidebari
The PREP Act and COVID-19, Part 1:
Statutory Authority to Limit Liability for
Medical Countermeasures
Updated April 13, 2022
To encourage the expeditious development and deployment of medical countermeasures during a public
health emergency, the Public Readiness and Emergency Preparedness Act (PREP Act) authorizes the
Secretary of Health and Human Services (HHS) to limit legal liability for losses relating to the
administration of medical countermeasures such as diagnostics, treatments, and vaccines. In a declaration
effective February 4, 2020 (the HHS Declaration), the Secretary of HHS (the Secretary) invoked the
PREP Act and declared Coronavirus Disease 2019 (COVID-19) to be a public health emergency
warranting liability protections for covered countermeasures. Under the HHS Declaration and its
amendments, covered persons are generally immune from legal liability (i.e., they cannot be sued for
money damages in court) for losses relating to the administration or use of covered countermeasures
against COVID-19. The sole exception to PREP Act immunity is for death or serious physical injury
caused by “willful misconduct.” However, individuals who die or suffer serious injuries directly caused
by the administration of covered countermeasures may be eligible to receive compensation through the
Countermeasures Injury Compensation Program (CICP).
Courts have characterized PREP Act immunity as “sweeping.” It applies to all types of legal claims under
state and federal law. For example, under state tort law, individuals who suffer injuries caused by the
intentional or negligent acts or omissions of another person may generally sue that person to recover
monetary compensation. Thus, in the health care context, if a health care provider negligently administers
a drug or device that causes a foreseeable injury to a patient, the injured person may be able to sue the
provider for compensation under state tort law.
Federal laws such as the PREP Act may preempt state tort laws—as well as other state and federal laws—
in certain contexts. Preemptive federal legislation displaces state law to alter the usual liability rules or
immunize certain individuals from liability. In the PREP Act, Congress made the judgment that, in the
context of a public health emergency, immunizing certain persons and entities from liability was
necessary to ensure that potentially life-saving countermeasures will be efficiently developed, deployed,
and administered.
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Part 1 of this two-part Sidebar reviews the statutory structure of the PREP Act and provides an overview
of CICP. Part 2 then looks at the HHS Declaration related to the COVID-19 pandemic to explain the
scope of the PREP Act’s liability immunity as it applies to COVID-19 countermeasures.
The Public Readiness and Emergency Preparedness Act
Scope of Immunity from Liability
For the PREP Act to apply, the Secretary must determine that a disease or other threat to health constitutes
a public health emergency, or that there is a credible risk of such an emergency. The Secretary shall
consider the desirability of encouraging the design, development, testing, manufacture, and use of
countermeasures in determining whether to issue a PREP Act declaration. (A PREP Act declaration is
distinct from the Secretary’s power to declare a public health emergency under Section 319 of the Public
Health Service Act, which has a separate set of legal implications. The Secretary made a Section 319
declaration for COVID-19 on January 31, 2020.) The Secretary must publish the PREP Act declaration in
the Federal Register and identify for each countermeasure the particular disease, time period, population,
and geographical area that the declaration covers.
If within the scope of the declaration, the PREP Act immunizes a covered person from legal liability for
all claims for loss relating to the administration or use of a covered countermeasure. The requirements for
PREP Act immunity thus break down into four elements: (1) the individual or entity must be a “covered
person”; (2) the legal claim must be for a “loss”; (3) the loss must have a “causal relationship” with the
administration or use of a covered countermeasure; and (4) the medical product that caused the loss must
be a “covered countermeasure.”
First, the PREP Act defines a covered person to include (i) the United States; (ii) manufacturers and
distributors of covered countermeasures; (iii) “program planners”; and (iv) “qualified persons” who
prescribe, administer, or dispense covered countermeasures. Program planners include Indian Tribes,
state governments, and local governments who supervise programs that dispense, distribute, or administer
covered countermeasures, or provide policy guidance, facilities, and scientific advice on the
administration or use of such countermeasures. Qualified persons include licensed health professionals
and other individuals authorized to prescribe, administer, or dispense covered countermeasures under
state law, as well as other categories of persons identified by the Secretary in a PREP Act declaration.
Employees and agents of all these persons and entities are also covered persons.
Second, PREP Act immunity reaches “all claims for loss” under federal and state law. Loss is broadly
defined to mean “any type of loss,” including (i) death; (ii) physical, mental, or emotional injury, illness,
disability, or condition; (iii) fear of such injury, including medical monitoring costs; and (iv) loss of or
damage to property, including business interruption loss. This language seemingly includes, at a
minimum, most state law tort, medical malpractice, and wrongful death claims arising from the
administration of covered countermeasures.
Third, the loss must have a causal relationship to the administration and use of a covered countermeasure.
As with the other elements, the PREP Act’s causation language sweeps relatively broadly. PREP Act
immunity applies to any claim for loss that has “a causal relationship with the design, development,
clinical testing or investigation, manufacture, labeling, distribution, formulation, packaging, marketing,
promotion, sale, purchase, donation, dispensing, prescribing, administration, licensing, or use” of a
covered countermeasure.
Fourth, the medical product at issue must be a covered countermeasure. The PREP Act specifies four
types of covered countermeasures: (i) a qualified “pandemic or epidemic product”; (ii) a “security
countermeasure”; (iii) a drug, biological product, or device that the U.S. Food and Drug Administration
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(FDA) has authorized for emergency use; and (iv) a “respiratory protective device” that is approved by
the National Institute for Occupational Safety and Health (NIOSH).
A pandemic or epidemic product includes any drug, biological product, or device developed “to diagnose,
mitigate, prevent, treat, or cure a pandemic or epidemic” or used “to limit the harm such pandemic or
epidemic might otherwise cause.” In addition, drugs, biological products, or devices used to treat the side
effects of a pandemic or epidemic product, or to enhance their effects, may themselves be covered
countermeasures. In either case, to be a covered countermeasure, the pandemic or epidemic product must
be approved, licensed, or authorized for emergency use by FDA.
Security countermeasure refers to a drug, biological product, or device used “to diagnose, mitigate,
prevent, or treat harm from any biological, chemical, radiological, or nuclear agent” identified by the
Secretary of Homeland Security as a material threat to national security.
The emergency use category of covered countermeasures includes drugs, biological products, and devices
that FDA has authorized for use outside its ordinary regulatory processes via an Emergency Use
Authorization (EUA). FDA has made wide use of its emergency authorities in response to the COVID-19
pandemic, issuing EUAs for certain in vitro diagnostic products (i.e., tests for COVID-19), antibody tests,
personal protective equipment (e.g., respirators and face shields), ventilators, therapeutic drugs, and
vaccines.
Section 6005 of the Families First Coronavirus Response Act and Section 3103 of the Coronavirus Aid,
Relief, and Economic Security Act (CARES Act) amended the PREP Act to add a fourth covered
countermeasure category for certain respiratory protective devices (such as N95 respirators). To be
covered by the PREP Act, the respiratory protective device must be (i) approved by NIOSH under 42
C.F.R. Part 84; and (ii) determined by the Secretary to be a priority for use during a public health
emergency. FDA issued an EUA on March 2, 2020, for the use of NIOSH-approved filtering respirators
intended for general use to protect health care personnel against COVID-19.
The “Willful Misconduct” Exception
If a claim is within the PREP Act’s scope, a covered person is generally immune from legal liability. The
“sole exception” to immunity is when a covered person proximately causes death or serious physical
injury to another person through willful misconduct. A serious physical injury must be life threatening,
permanently impair a body function, permanently damage a body structure, or require medical
intervention to avoid such permanent impairment or damage. Willful misconduct requires that the covered
person acted (i) intentionally to achieve a wrongful purpose; (ii) knowingly without legal or factual
justification; and (iii) in disregard of a known or obvious risk that is so great as to make it highly probable
that the harm will outweigh the benefit.
The process by which injured persons (or their representatives) may prove willful misconduct under the
PREP Act is limited in several ways. Before filing a lawsuit claiming willful misconduct, injured persons
must first seek compensation through CICP (see below), and they cannot sue if they elect to receive that
compensation. If they choose to file a lawsuit, injured persons may sue only in the U.S. District Court for
the District of Columbia. Such lawsuits must meet heightened standards for pleading and discovery, and
are subject to procedural provisions generally favorable to defendants. Injured persons must prove willful
misconduct by clear and convincing evidence (a higher standard than in a typical civil case), and recovery
for noneconomic damages such as pain and suffering is limited.
In addition to these procedural and substantive limitations, the PREP Act contains two statutory defenses
to claims of willful misconduct. First, program planners and qualified persons cannot be found to have
engaged in willful misconduct if they “acted consistent with applicable directions, guidelines, or
recommendations by the Secretary regarding the administration or use of a covered countermeasure,” and
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notify either the Secretary or a state or local health authority of the injury or death allegedly caused by the
countermeasure within seven days. Second, countermeasure manufacturers and distributors may rely on
regulatory compliance as a complete defense to a willful misconduct allegation. When the act or omission
alleged to be willful misconduct is “subject to regulation” under the Public Health Service Act or the
Federal Food, Drug, and Cosmetic Act (e.g., by FDA), an injured person cannot succeed on a willful
misconduct claim unless the Secretary or the Attorney General has brought certain enforcement actions
against the manufacturer or distributor that result in the imposition of particular penalties.
The Countermeasures Injury Compensation Program
An individual seriously injured or killed by the administration of a covered countermeasure, whether or
not as a result of willful misconduct, may seek compensation through CICP. CICP is a regulatory process
administered by HHS’s Health Resources and Services Administration. HHS regulations govern CICP’s
procedures and eligibility determinations. In general, eligible individuals (or their survivors) who suffer
death or serious physical injury directly caused by the administration of a covered countermeasure may
receive reimbursement for reasonable medical expenses, loss of employment income, and survivor
benefits in the case of death. Serious physical injuries under CICP are generally limited to those that
warrant hospitalization or led to a significant loss of function or disability. Congress funds CICP awards
through emergency appropriations to the Covered Countermeasure Process Fund.
Both the CARES Act and the Coronavirus Preparedness and Response Supplemental Appropriations Act
(CPRSA) appropriate funding that HHS may use for the Covered Countermeasure Process Fund. CPRSA
appropriates $3.1 billion to the Secretary to respond to COVID-19, including the development and
purchase of countermeasures and vaccines, while allowing these funds to “be transferred to, and merged
with” the Covered Countermeasure Process Fund. Similarly, the CARES Act appropriates $27 billion to
the Secretary for similar purposes, again providing that the Secretary may transfer these funds to the
Covered Countermeasure Process Fund.
CICP is distinct from the National Vaccine Injury Compensation Program (VICP) which provides
compensation for injuries caused by most vaccines routinely administered in the United States, such as
childhood vaccines (e.g., MMR, polio, hepatitis A) and nonpandemic seasonal influenza vaccines. By
contrast, CICP only applies to countermeasures covered by a PREP Act declaration of a public health
emergency, such as those issued for COVID-19, pandemic influenza (e.g., the 2009 H1N1 “swine flu”),
and the Ebola virus. VICP is funded through an excise tax on licensed vaccines recommended by the
Centers for Disease Control and Prevention (CDC) for routine administration to children or pregnant
women. Generally speaking, compensation through CICP is somewhat more limited than VICP. For
example, attorneys’ fees and pain-and-suffering damages are not available through CICP, and the statute
does not allow for judicial review of HHS’s CICP-compensation determinations.
While the PREP Act declaration for COVID-19 countermeasures remains in effect, persons seriously
injured by the administration of a COVID-19 vaccine (such as the Johnson & Johnson vaccine, the
Moderna vaccine, or the Pfizer-BioNTech vaccine) could seek compensation through CICP, not VICP.
The CDC indicates that serious adverse reactions to COVID-19 vaccines are rare. (For more information
on compensation programs for COVID-19 vaccine injuries, see this Sidebar.)
For details on how the Secretary of HHS has used its statutory authority under the PREP Act to provide
liability protections for COVID-19 countermeasures, please see Part 2 of this Sidebar.
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Author Information
Kevin J. Hickey
Legislative Attorney
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