The vaccines do not guarantee you will not get sick, but they sharply reduce the chance that infection will turn severe or fatal.
Com a chegada do inverno ao hemisfério sul, o Brasil enfrenta uma pressão crescente sobre seus sistemas de saúde, à medida que dois vírus respiratórios — o VSR e a influenza — avançam simultaneamente por diferentes faixas etárias da população. Os dados do Infogripe, sistema de vigilância da Fundação Oswaldo Cruz, revelam que onze estados já operam em níveis de alerta ou alto risco, e a trajetória aponta para semanas ainda mais difíceis. É um momento que a humanidade conhece bem: o frio que aproxima os corpos também aproxima os vírus, e a resposta coletiva — vacinas, cuidado, solidariedade — determina o peso que cada estação deixa para trás.
- Onze dos 27 estados brasileiros estão em alerta ou alto risco para síndrome respiratória aguda grave, com a tendência apontando para piora nas próximas seis semanas.
- O VSR domina as internações de crianças menores de quatro anos, enquanto a influenza A avança entre adultos e idosos e a influenza B cresce entre crianças em idade escolar.
- Desde o início de 2026, 3.591 pessoas morreram de síndrome respiratória aguda grave no Brasil — um número que continua subindo com o aprofundamento do inverno.
- O comportamento sazonal amplifica o risco: o frio empurra as pessoas para ambientes fechados e mal ventilados, criando as condições ideais para a circulação dos vírus.
- Autoridades de saúde pedem vacinação imediata dos grupos prioritários contra influenza e VSR, além de uso de máscaras N95 ou PFF2 em locais de aglomeração.
- Doze estados que apresentam tendência de estabilização ainda registram patamares de alerta ou alto risco — estabilidade que não significa segurança.
O Brasil entra no inverno com os hospitais sob pressão crescente. Os dados divulgados pelo Infogripe, sistema de vigilância epidemiológica da Fundação Oswaldo Cruz, referentes à semana de 31 de maio a 6 de junho, mostram aumento nas internações por vírus sincicial respiratório (VSR) e influenza em várias regiões do país. Onze estados — entre eles São Paulo, Paraná, Santa Catarina e Rio Grande do Sul — já estão em níveis de alerta, risco ou alto risco para síndrome respiratória aguda grave, com projeção de piora nas próximas seis semanas. No total, 3.591 pessoas morreram da síndrome em 2026.
Os vírus não afetam todos da mesma forma. O VSR concentra suas vítimas mais graves entre crianças menores de quatro anos. A influenza A predomina entre adultos jovens, pessoas de meia-idade e idosos. Já a influenza B está em ascensão entre crianças em idade escolar e adultos em plena vida produtiva. O rinovírus, por sua vez, circula com força entre crianças e adolescentes de cinco a quatorze anos.
A pesquisadora Tatiana Portella, do boletim Infogripe e do programa de computação científica da Fiocruz, listou as medidas essenciais: higiene frequente das mãos, uso de máscaras em hospitais e ambientes fechados, isolamento ao apresentar sintomas e, acima de tudo, vacinação. As vacinas contra influenza e VSR não eliminam o risco de infecção, mas reduzem significativamente a chance de evolução grave ou fatal.
O que torna este momento particularmente delicado é a combinação entre o calendário e o comportamento humano. O inverno leva as pessoas para dentro de casa, para espaços fechados e com pouca ventilação — exatamente o ambiente em que vírus respiratórios prosperam. A vulnerabilidade é previsível. O que ainda está em aberto é a resposta coletiva: quantas pessoas vão se vacinar, quantas vão adotar precauções, e com que velocidade os vírus vão percorrer o país antes que o calor volte.
Brazil is moving into winter, and the respiratory viruses are moving with it. As temperatures drop across the country, hospitals are filling with patients suffering from two distinct but overlapping threats: respiratory syncytial virus, known as RSV, and influenza. The data arrived this week from Infogripe, the surveillance system run by the Oswaldo Cruz Foundation, a federal research institution that tracks disease patterns across the nation. The numbers tell a story of seasonal pressure building in real time.
The week of May 31 through June 6 marked a turning point. During those seven days, when indoor crowding increases and air circulation drops, hospitalizations for RSV climbed noticeably. In some regions, flu admissions rose alongside it. Eleven of Brazil's 27 states now sit at alert, risk, or high-risk levels for severe acute respiratory syndrome—the medical term for the serious respiratory infections these viruses cause. Those eleven states are Acre, Alagoas, Amapá, Paraná, Pará, Rio Grande do Norte, Rio Grande do Sul, Roraima, Santa Catarina, Sergipe, and São Paulo. The concerning part is not just where they are now, but where they are heading: the data suggests the trend will continue climbing over the next six weeks.
The remaining sixteen states show some signs of stabilization or decline in their longer-term trends, but that does not mean they are safe. Twelve of them—Amazonas, Bahia, Ceará, Distrito Federal, Espírito Santo, Goiás, Maranhão, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Paraíba, and Rio de Janeiro—still register at alert or high-risk levels. They are holding steady at dangerous thresholds rather than improving. Across the entire country, 3,591 people have already died from severe acute respiratory syndrome in 2026.
The viruses are not hitting all age groups equally. RSV is the dominant threat for children under four years old, driving most of the hospitalizations in that age bracket. Rhinovirus has taken hold among children and teenagers aged five to fourteen. But influenza A is the story among young adults, middle-aged people, and the elderly. Influenza B, meanwhile, is climbing—particularly among school-age children and people in their working years.
Tatiana Portella, a researcher with the Infogripe bulletin and the Fiocruz scientific computing program, laid out what people need to do. Wash your hands regularly. Wear masks in hospitals and in crowded spaces where air does not move freely. If you develop symptoms of flu or a cold, stay home. If you cannot stay home, wear a high-quality mask—N95 or PFF2—when you go out. But the most critical step, she emphasized, is vaccination. People in priority groups and those who are eligible should get vaccinated against both influenza and RSV. The vaccines do not guarantee you will not get sick, but they sharply reduce the chance that infection will turn severe or fatal.
What makes this moment distinct is the convergence of two factors: the calendar and the thermometer. Winter is arriving in Brazil's southern regions, and with it comes the behavior that spreads respiratory viruses—people moving indoors, gathering in enclosed spaces, breathing the same recirculated air. The viruses are not new. The vulnerability is seasonal and predictable. What happens next depends partly on how many people heed the warnings about vaccination and precaution, and partly on how quickly the viruses move through the population before winter loosens its grip.
Citas Notables
It is important that people in priority groups and those who are eligible take the vaccine against influenza and RSV, to reduce the chances of developing the more severe form of the disease or dying if they become infected by these viruses.— Tatiana Portella, researcher with Infogripe and Fiocruz
La Conversación del Hearth Otra perspectiva de la historia
Why does RSV hit young children so much harder than other groups?
RSV targets the smallest airways in the lungs—the bronchioles—and young children's airways are literally smaller and more easily blocked. Their immune systems also haven't encountered the virus before, so there's no memory to draw on. It's a matter of anatomy and immunological naivety.
The data shows influenza A is the problem for adults. Is that because adults are less vaccinated, or because the virus itself is more severe in that group?
Both, probably. Adults may have lower vaccination rates than they should, but also influenza A tends to cause more systemic illness in adults—it spreads through the body differently than RSV does. It's not just about who gets vaccinated; it's about how the virus behaves in different bodies.
Eleven states at high risk, but twelve more still at alert level even though they're not growing. That sounds like they're stuck, not improving.
Exactly. They're not getting worse, but they're not getting better either. They're in a holding pattern at a dangerous altitude. That's actually more fragile than it sounds—one small push, one cluster outbreak, and they could tip back into growth.
The researcher emphasizes vaccination for "priority groups." Who are those people?
Typically the elderly, young children, pregnant women, and people with chronic conditions. But the message here is broader: if you're eligible, get vaccinated. The priority groups are just where the benefit is most dramatic.
Three thousand five hundred ninety-one deaths already this year. Is that a lot?
It's substantial. That's the death toll from severe acute respiratory syndrome specifically—the serious cases that land people in hospitals. Most people with flu or RSV recover at home. These are the ones who couldn't fight it off.