Using HIPAA compliant email to raise awareness for the Hantavirus

On May 8, 2026, the CDC issued a Health Alert Network (HAN) Health Advisory following a confirmed cluster of hantavirus cases linked to a cruise ship traveling through the South Atlantic. The ship departed Ushuaia, Argentina on April 1, 2026, and visited remote locations including Antarctica, South Georgia Island, and Tristan da Cunha. As of May 8, WHO had reported eight cases, six confirmed and two suspected, including three deaths among the 147 passengers and crew from 23 countries.

The strain responsible is the Andes virus, and the CDC advisory notes, Andes virus "is the only type of hantavirus that has been documented to spread from person-to-person" a distinction from other hantavirus strains, which are transmitted only through contact with infected rodents.

The CDC has stated that "the risk to the public's health in the United States is considered extremely low at this time," and is working with federal, state, local, and international partners to monitor exposed American passengers.

Understanding the Hantavirus threat

Hantavirus is a rare but potentially fatal disease transmitted primarily through contact with infected rodent droppings, urine, or saliva. The virus can cause Hantavirus Pulmonary Syndrome (HPS), which presents severe respiratory symptoms. According to the CDC, among patients who develop severe respiratory symptoms, "the case fatality rate has been estimated at approximately 38%."

According to the CDC's May 8 HAN advisory, "symptoms of HPS caused by Andes virus usually appear within 4–42 days after exposure," and early symptoms such as fever, fatigue, muscle aches, headaches, nausea can be confused with influenza or other common illnesses. This makes early recognition and public education important.

The CDC advisory further warns that "patients with suspected HPS can deteriorate rapidly, and delayed care reduces the chance of survival." There is currently no specific antiviral treatment, the CDC advises that "early supportive care is critical even before the diagnosis is confirmed."

Furthermore, detection is often unreliable within the first 72 hours of symptoms, and the CDC recommends repeat diagnostic testing after that window.

The importance of HIPAA compliance in health communication

Enacted as Public Law 104-191, the Health Insurance Portability and Accountability Act of 1996 established federal standards protecting sensitive health information from disclosure without patient consent. Its implementing regulations, codified at 45 CFR Parts 160 and 164, govern how covered entities handle protected health information (PHI) across all media.

Under 45 CFR § 164.501, PHI is defined as any individually identifiable health information held or transmitted by a covered entity, including demographic data relating to an individual's past, present, or future health condition, care received, or payment for care. Covered entities under HIPAA include healthcare providers, health plans, and healthcare clearinghouses, as defined at 45 CFR § 160.103. Business associates who handle PHI on behalf of covered entities must also comply.

Organizations must ensure that hantavirus awareness emails don't contain identifiable health information linked to specific individuals. General public health education is different from patient communications, which require additional safeguards. If an organization is sending general public health information without referencing specific individuals or their health conditions, many of the stricter requirements do not apply but the principles of secure, responsible communication are still in place.

Learn more: HIPAA compliance in communication

Best practices for HIPAA compliant health awareness emails

1. Use encrypted email platforms

The HIPAA Security Rule, under 45 CFR § 164.312(e)(1), requires covered entities to implement technical security measures that guard against unauthorized access to electronic PHI transmitted over open networks. This standard includes addressable specifications for both integrity controls and encryption, meaning covered entities must assess their use of open networks, identify appropriate protection measures, select a solution, and document the decision.

Supporting standards under 45 CFR § 164.312(a) and § 164.312(c)(1) further require that policies be in place to restrict access to and protect the integrity of e-PHI.

Learn more: Paubox: HIPAA Compliant Email

2. Implement secure authentication

Require recipients to authenticate themselves before accessing sensitive health information. This aligns with the Workforce Security standard at 45 CFR § 164.308(a)(3) and the Security Awareness and Training standard at 45 CFR § 164.308(a)(5), which govern who may access e-PHI and require that workforce members are trained on security procedures, including email best practices.

3. Avoid unnecessary PHI

The most effective way to stay compliant is to avoid including PHI in your emails wherever possible. This reflects the "minimum necessary" standard established under 45 CFR § 164.514(d), which requires that disclosures of PHI be limited to only what is needed to accomplish the stated purpose.

Hantavirus awareness campaigns can be useful without referencing specific patient cases or identifying individuals. Focus on educating the public about:

• Symptoms of hantavirus and when to seek medical care
• Prevention measures and risk reduction strategies
• Geographic areas with higher hantavirus prevalence
• What to do if exposed to rodent droppings
• In the context of the 2026 outbreak, what close contact with a symptomatic person means, and when to seek evaluation
  
  

4. Use de-identified data

If you want to share case data or statistics, ensure the information is properly de-identified. Under 45 CFR § 164.514(a)–(b), HIPAA provides two recognized methods for de-identification, the Safe Harbor method (removing 18 specified identifiers) and the Expert Determination method. De-identified information is not subject to HIPAA restrictions. Remove all identifiers such as names, dates of birth, addresses, medical record numbers, and any other information that could identify an individual. Share aggregate statistics, such as the WHO-reported case counts from the 2026 cruise ship cluster, to raise awareness without compromising anyone's privacy.

5. Leverage the public health disclosure pathway

Under 45 CFR § 164.512(b), covered entities are permitted to disclose PHI to public health authorities for public health activities, including the prevention and control of disease, without individual authorization. More specifically, 45 CFR § 164.512(b)(1)(iv) allows disclosure to persons who may have been exposed to a communicable disease or may be at risk of contracting or spreading it, when the covered entity is legally authorized to make such notification.

This means that, in the context of the 2026 Andes virus outbreak, a covered healthcare provider could legally notify potentially exposed individuals, such as cruise ship passengers or contacts of confirmed cases, without waiting for signed authorizations, provided such notification is part of an authorized public health intervention.

6. Secure email protocols

Implement secure email protocols like TLS (Transport Layer Security) encryption, consistent with the transmission security requirements of 45 CFR § 164.312(e)(1). This ensures that emails are encrypted during transmission, protecting information from interception.

7. Clear Privacy Statements

Include privacy statements in your emails explaining how recipient information will be used and protected. Under 45 CFR § 164.520, covered entities are required to provide individuals with a Notice of Privacy Practices. Additionally, under 45 CFR § 164.522(b), individuals have the right to request confidential communications by alternative means, and covered entities are required to honor reasonable such requests. Let recipients know they can unsubscribe from future communications and explain your data retention policies.

Crafting effective Hantavirus awareness content

Provide actionable information

Recipients should know exactly what to do. The CDC advisory recommends that clinicians include HPS in their differential diagnosis for anyone showing compatible symptoms who, within 42 days before symptom onset, had direct physical contact with a symptomatic confirmed or suspected Andes virus case, or was exposed to that person's respiratory secretions or body fluids.

Include reliable resources

Direct recipients to authoritative sources. The CDC's HAN advisory (May 8, 2026) and the WHO's ongoing situation reports are the most current references available. Provide links to the CDC Emergency Operations Center contact (770-488-7100) for providers with specimen submission questions, and to local health department resources for the general public.

Tailor messages to your audience

Different audiences need different messages. Healthcare providers should receive the CDC's full clinical guidance, including biosafety recommendation. The general public needs clear prevention and symptom recognition information. Segment your email lists and customize content accordingly, ensuring all messages remain HIPAA compliant.

Read also: HIPAA Compliant Email: The Definitive Guide (2026 Update)

FAQs

Do small healthcare practices need to follow the same HIPAA rules as large hospitals?

Yes, HIPAA applies to all covered entities regardless of size.

What happens if an organization sends a non-compliant health email by mistake?

A breach must be assessed under HIPAA's Breach Notification Rule, and depending on the scope, the organization may be required to notify affected individuals, HHS, and in some cases the media.

Can patients opt out of receiving health awareness emails?

Yes, individuals have the right under HIPAA to request that communications be delivered through alternative channels, and organizations must honor reasonable requests.