Preventing the international spread of Ebola requires more than a single screening procedure at airports and other border crossings. Health authorities must combine temperature checks, travel history assessments, symptom questionnaires and digital health declarations to identify travellers who may require further medical evaluation.

Dr. Wessam Mankoula of the Africa Centres for Disease Control and Prevention (Africa CDC) has highlighted the importance of these measures at points of entry, explaining how the first layer of Ebola detection operates and why accurate information from travellers remains essential.

The approach reflects a broader principle of public health preparedness: border screening can help identify potential health risks, but it cannot independently detect every infected person or prevent every possible transmission.

Temperature Screening Provides an Initial Check

Thermal screening is one of the first measures used to assess travellers arriving at airports and other international entry points. Health personnel or screening equipment check body temperature to identify individuals who may have a fever.

Because fever can occur during Ebola virus disease, an elevated temperature may indicate the need for additional assessment. However, fever is not specific to Ebola and can result from many other illnesses.

Temperature screening also has important limitations. A person infected with Ebola may not yet have developed symptoms, and therefore may not have a fever when passing through a checkpoint. Temperature checks alone cannot confirm or rule out an infection.

For this reason, health authorities use temperature measurements alongside other screening procedures rather than treating them as a definitive diagnostic test.

Reviewing Travel History Over the Previous 21 Days

Another important element is reviewing a traveller’s movements during the previous 21 days. This period is relevant because Ebola symptoms generally develop between two and 21 days after exposure to the virus.

Travel history can help health officials assess whether a person has visited an area experiencing an Ebola outbreak or may have encountered a known source of infection.

The information becomes particularly valuable when combined with details about possible exposure, including contact with someone who was ill or with bodily fluids from an infected person.

A travel history does not establish that someone is infected. Instead, it helps health personnel determine whether further questions, monitoring or medical assessment may be necessary.

Accurate declarations are therefore important for identifying potential risks that might not be apparent during a brief temperature check.

Asking About Ebola Symptoms

Symptom questionnaires provide another opportunity to identify travellers who may need additional attention.

Health personnel may ask about symptoms associated with Ebola, including fever, severe weakness, headache, muscle pain, sore throat, vomiting, diarrhoea, rash and, in some cases, unexplained bleeding. Symptoms vary, and many overlap with those of other infectious diseases.

A traveller who reports concerning symptoms may require further assessment based on their travel history and possible exposure.

It is important to understand that symptoms alone cannot confirm Ebola. Diagnosis requires appropriate medical evaluation and laboratory testing under established public health procedures.

Anyone who believes they may have been exposed to Ebola and develops compatible symptoms should contact health authorities or a healthcare provider promptly and follow instructions designed to prevent potential exposure to others.

Digital Health Declarations Support Risk Assessment

Digital health declarations, including systems accessed through QR codes, can help collect relevant information before or during arrival procedures.

Depending on the system used, travellers may be asked to provide information about recent travel, symptoms and other health-related details. Digital submissions can help authorities organise information and identify declarations that require additional review.

These systems may also make it easier to manage information at busy entry points, although their effectiveness depends on reliable technology, appropriate data handling and the accuracy of the information submitted.

A digital declaration is not a medical diagnosis. It is a screening tool that supports decisions about whether further checks are necessary.

Health authorities must also consider travellers who have limited access to digital devices or face difficulties completing electronic forms. Accessible alternatives can help ensure that screening procedures do not exclude people who need assistance.

Why Honest Reporting Is Essential

The effectiveness of border screening depends partly on travellers providing complete and truthful information.

A person who conceals symptoms, provides an inaccurate travel history or fails to disclose a possible exposure may prevent health personnel from recognising a risk that requires attention.

Honest reporting allows officials to make better-informed decisions about further assessment, medical care and appropriate public health precautions.

Declaring symptoms does not automatically mean that a traveller has Ebola or will be denied entry. It enables health professionals to evaluate the circumstances and determine the appropriate response.

Public communication should therefore encourage cooperation rather than fear or stigma. People who may be at risk should be treated with dignity, and screening information should be handled responsibly.

Protecting individual health and preventing the spread of infectious diseases are shared public health objectives.

Border Screening Is Only the First Layer of Protection

Even well-designed screening systems have limitations. Some infected individuals may not show symptoms at the time of travel, while others may pass through checks because their exposure is not immediately apparent.

Consequently, effective Ebola preparedness requires coordinated measures beyond airports and border crossings.

These may include surveillance within communities, rapid investigation of suspected cases, laboratory diagnostic capacity, infection prevention and control in healthcare facilities, contact tracing and timely communication with affected populations.

Healthcare workers also require appropriate protective equipment, training and procedures for safely managing suspected cases.

Coordination between countries is particularly important when an outbreak affects areas connected through travel and trade. Sharing reliable information can help authorities assess risks and respond to emerging developments.

Border screening can contribute to early identification, but it must operate as part of a wider public health system.

Public Awareness Remains a Critical Component

Ebola outbreaks can create uncertainty among travellers and communities, making clear and accurate communication essential.

Health authorities should explain what screening involves, which symptoms require attention and how individuals can seek assistance. They should also make clear that having a fever or another compatible symptom does not necessarily mean a person has Ebola.

Timely reporting of possible exposure can help people receive appropriate care and enable health professionals to investigate suspected cases more quickly.

The emphasis on truthful health declarations is therefore not simply an administrative requirement. It is part of a coordinated effort to identify potential infections, protect healthcare workers and reduce the risk of further transmission.

Strengthening Preparedness Against Ebola

The screening measures described by Dr. Wessam Mankoula of Africa CDC illustrate how several relatively straightforward procedures can work together to support the early identification of potential Ebola cases.

Temperature checks, 21-day travel histories, symptom questionnaires and digital health declarations each provide different information. None is sufficient on its own, but their combined use can help health authorities determine when additional assessment is warranted.

Their success ultimately depends on trained personnel, reliable systems, cooperation between public health agencies and accurate information from travellers.

As international travel continues to connect countries and communities, strengthening these layered safeguards remains an important part of infectious disease preparedness. Early reporting, responsible screening and coordinated public health action can help protect travellers, families and communities while supporting a timely response to potential outbreaks