In managing seasonal epidemics, the flu vaccine plays a significant role, serving as a noteworthy primary prevention measure. In the following paragraphs, we will see why getting vaccinated is advisable, focusing on the individual and collective benefits of this choice. We will then discuss the specific features of this tool, as well as how it is applied within the community. Finally, we will move on to indoor air sanitization, mentioning some standout technologies.
Why get vaccinated against the flu
Turning to the flu vaccine results in a multitude of benefits, starting from the individual sphere to collective well-being. The Ministry of Health, in fact, recommends its periodic use, highlighting, among other things, its features of effectiveness and safety.
Individual benefits: fewer complications and absences
The individual benefits of the vaccine are mostly intuitive, yet not negligible. Getting vaccinated not only reduces the risk of contracting the flu, but also of incurring complications that it may cause. This is significant for vulnerable individuals, such as the elderly, those with chronic illnesses (e.g., diabetics, heart patients, etc.), and immunocompromised patients. Also included in the vulnerable group are pregnant women, for whom adherence is sometimes documented as insufficient.
Collective benefits: schools, nursing homes, hospitals, and communities
Mass vaccination supports collective protection, as it results in a milder spread of influenza viruses. Tangibly, this phenomenon is particularly relevant in highly crowded settings, such as schools, university classrooms, and public transport. Also to be highlighted, in the same context, are public and private healthcare environments, where vulnerable and less vulnerable individuals coexist. Among other things, mass vaccination reduces the number of hospitalizations, lowering the pressure on the healthcare system and the related costs. Lastly, and importantly, getting vaccinated limits absenteeism in education and the workplace, boosting productivity across sectors.
When to do it: seasonality and protection
For it to be effective, the flu vaccination must be carried out within a predetermined time window. Below are some details on this.
Ideal period in Italy and duration of coverage
In our country, the flu season begins at the start of autumn and continues until March. Getting vaccinated by October allows the body to develop adequate protection, facing the epidemic period in the best way. It is essential to recognize, in this regard, that the vaccine formulation is not immediately effective, requiring about two weeks to produce an adequate antibody response. Once acquired, the immunity conferred by the vaccine generally covers the entire flu season, although it depends on some individual factors, such as age and overall health status.
Why vaccinating too early can reduce seasonal effectiveness
Over time, vaccine-induced immunity tends to wane, becoming less “energetic” in countering viral agents. Getting vaccinated well in advance means, in other words, facing the seasonal epidemic less prepared. Therefore, it is advisable to adhere to the timing of annual vaccination campaigns to identify the most suitable moment.
Types of vaccines and selection criteria
In terms of composition and spectrum of action, flu vaccines are adapted to different needs. In any case, the formulations used in Italy are subject to authorization by the Italian Medicines Agency (AIFA). Below are some specifics.
Quadrivalent, adjuvanted, and high-dose: key differences
A first feature concerns the number of strains the vaccine targets. Trivalent vaccines, currently available, are effective against two type A viruses (H1N1 and H3N2) and one type B virus. Quadrivalent vaccines, on the other hand, are active against two type A strains and two type B strains. The target viruses of future formulations are reassessed and updated annually, based on predictions of circulating strains. According to notifications from the Istituto Superiore di Sanità, by the 2025/2026 season there will be a transition from quadrivalent to trivalent formulations, excluding the B/Yamagata virus. Specifically, this is a virus no longer considered a public health risk.
Additional features can make the vaccine more effective. High-dose formulations, in particular, are enhanced by a greater amount of antigen and are capable of boosting the body’s immune response. Lower-dose formulations, however, can be enhanced by adding an adjuvant substance, known as MF59. In general, both adjuvanted vaccines and high-dose vaccines are indicated for the older segments of the population.
Selection by age: clinical conditions and risk factors
The choice of the most suitable vaccine requires an appropriate assessment of the individual by the attending physician. The selection should therefore be based on age, pre-existing clinical conditions, and any risk factors.
For elderly individuals and those with chronic conditions, such as heart disease or respiratory ailments, targeted vaccines are available. High-dose and adjuvanted vaccines, for example, are designed to offer more robust protection in these at-risk groups.
In the pediatric age group, on the other hand, the applied formulations comply with specific safety criteria.
Supporting indoor air mitigation
The flu vaccine ideally fits into a broader prevention framework. To reduce the infection risk related to influenza, as well as other circulating respiratory viruses, it is appropriate to adopt additional measures. An essential factor in this context concerns indoor air healthiness, understood as the air we breathe inside enclosed spaces. To support its quality, it is possible to intervene with adequate ventilation and the use of advanced filters, as well as daily sanitization practices. Such a systematically conducted approach reduces the presence of viruses suspended in bioaerosols and/or deposited on surfaces.
Ventilation, filters, and proper sanitization practices
Ventilating indoor environments results in air exchange and “dilutes” the accumulation of airborne viral particles. This is achieved by simply and frequently opening windows or through dedicated mechanical ventilation systems (MV). In the latter case, this is the ideal solution for spaces without openings to the outside, as well as a reliable way to achieve continuous air exchange. Today, mechanical ventilation is enhanced by high-efficiency filtration systems, such as HEPA filters, and air monitoring technologies capable of detecting undesirable values of certain parameters (e.g., humidity and temperature). Returning to HEPA filters, they retain 99.995% of indoor air contaminants, capturing even viral particles in bioaerosols.
For a healthy environment, it is advisable to also sanitize surfaces, on which contaminants and pathogens can deposit. Proper sanitization practice, to be carried out regularly, includes removing coarse dirt, washing with detergents (where possible), and applying disinfectants.
e4life electromagnetic waves: role and practical integration
Among cutting-edge technologies for indoor air purification, we highlight the devices by e4life. Available in different versions, for environments and for individuals, they are aimed at neutralizing respiratory viruses, proving effective, non-invasive, and safe for human and animal health.
The e4shieldtm technology on which the devices are based consists of emitting electromagnetic waves at a specific frequency, better classified as microwaves. Propagating through the surrounding space, the waves impact suspended viruses and damage their structure, rendering them inactive and no longer risky to humans.
With regard to the version for environments, it is a non-bulky device that can be easily mounted on walls or ceilings. Once in operation, the device ensures a protected area of about 50 m². The e4life personal device, in turn, offers comfortable and discreet portability, ensuring a “safety cloud” in the immediate vicinity of the user.
Safety, evidence, and areas of use for electromagnetic wave devices
Electromagnetic wave technology must meet essential safety criteria. Regarding electromagnetic compatibility, the devices in question must comply with Directive 2014/30/EU. In addition, according to EU regulations, they should obtain SAR (Specific Absorption Rate) certification, relating to safe exposure of biological tissues.
Electromagnetic wave technology adapts to multiple environments and situations. In general, it is useful in confined and high-traffic spaces, especially if poorly ventilated. Using it in the winter period helps protect against influenza viruses and other circulating viruses, although it can be beneficial throughout the year. In the portable version, moreover, the technology protects the user in any unsanitized gathering place (e.g., offices, public transport, waiting rooms, etc.). Electromagnetic wave devices are used in healthcare environments (e.g., hospitals, clinics, nursing homes), protecting vulnerable individuals and staff, as well as in the livestock sector, where infection risk also affects farm animals.
Evidence and operational limits
The effectiveness of electromagnetic wave technology has been validated by targeted experimental investigations aimed at understanding the mechanisms involved and the remaining limitations. One study, among those in the literature, investigated the nature of the damage induced by the waves, highlighting target elements in the structure of pathogens. A second investigation, on the other hand, explored the characteristics of certain viruses (such as size) to identify the most suitable neutralizing conditions for each pathogen under examination. A possible limitation of these tools lies in their adaptation to the rapidity of viral mutations. It may be necessary, essentially, to refine the applied technology from time to time.
FAQs
If I get vaccinated, can I still get sick?
Yes, but getting the vaccine helps limit the development of severe forms and potential complications.
When is it recommended to get the flu vaccine?
It is preferable to get vaccinated in October, at the beginning of the flu season.
Do e4life devices replace the flu vaccine?
No, e4life devices are part of a broader prevention context, complementing individual measures such as the vaccine and environmental sanitization.
Are there any contraindications for using e4life devices?
For optimal use of e4life devices, it is advisable to consult the supplied instructions and assess the suitability of spaces for installation.
How to integrate e4life devices with ventilation and cleaning?
For optimal indoor air sanitization, these devices can coexist with natural and/or mechanical ventilation of environments, as well as with regular cleaning procedures. In any case, it is preferable to avoid any interaction that could damage the devices themselves (e.g., contact with water).
