Ha quedado demostrado que tras pasar la enfermedad del Covid-19, se forman anticuerpos que protegen de la enfermedad. Sin embargo, estos anticuerpos tienen un tiempo establecido de duracion. Los anticuerpos contra el Covid-19 se vuelven indetectables en las pruebas serológicas en un 43,3% de los pacientes transcurridos siete meses desde la infección, según […]
On March 31, the Centers for Disease Control and Prevention (CDC) recommended that all adults aged 19-59 years receive a vaccination for hepatitis B. It also added that adults aged 60 years or older without known risk factors for hepatitis B may get vaccinated. The agency earlier recommended the vaccination for all infants and children […]
China reafirma su política de “COVID-19 cero” y dispone su mayor confinamiento desde 2020 Cuando a comienzos de 2020 China confinó a los 11 millones de residentes de Wuhan durante 76 días, el resto del mundo, hasta entonces libre del nuevo virus, miró asombrado. Dos años después la situación se […]
On the same day in March 2020 that President Donald Trump declared the COVID-19 pandemic a national emergency, researchers at the Larry A. Green Center in Virginia launched an ongoing survey of COVID-19’s effects on primary care practices. Over the past 2 years, more than 36 000 survey responses from clinicians across the […]
A year after infection with the coronavirus, when antibodies in the blood are barely detectable, the immune system continues to “remember” the virus and should respond to some extent upon re-encountering it, a study from China suggests. Researchers studied 141 people infected with the virus in the first half of […]
The efficacy of ivermectin in preventing hospitalization or extended observation in an emergency setting among outpatients with acutely symptomatic coronavirus disease 2019 (Covid-19), the disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is unclear. METHODS We conducted a double-blind, randomized, placebo-controlled, adaptive platform trial involving symptomatic SARS-CoV-2–positive adults […]
BACKGROUND Active immunization with the BNT162b2 vaccine (Pfizer–BioNTech) has been a critical mitigation tool against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection during the coronavirus disease 2019 (Covid-19) pandemic. In light of reports of waning protection occurring 6 months after the primary two-dose vaccine series, data are needed on […]
Tick-borne encephalitis (TBE) virus is spread through the bite of an infected tick. Occasionally, TBE virus can spread to people through eating or drinking raw milk or cheese from infected goats, sheep, or cows. TBE virus can be found in parts of the region stretching from western and northern Europe […]
The Omicron subvariant BA.2 is replacing its sister version, BA.1, as the dominant form of SARS-CoV-2 in many countries, which has led scientists to wonder whether the COVID-19 pandemic is about to throw these regions into disarray yet again. But a study published on 13 March shows that mRNA vaccines offer a similar degree […]
Mortalidad récord en Hong Kong y millones de confinados en China Hasta hace algunas semanas Hong Kong era un territorio casi liberado de COVID-19, con solo 12.000 casos y apenas 220 decesos para fines de 2021 (sobre una población de casi 7,5 millones). Pero desde febrero los casos estallaron, con más de […]
