Introduction The infection fatality rate (IFR) of COVID-19 has been carefully measured and
analysed in high-income countries, whereas there has been no systematic analysis of age …

Toxoplasma gondii and Mycobacterium tuberculosis are pathogens that are harmful to
humans. When these diseases interact in humans, the result is typically fatal to the public …

SARS-CoV-2 seroprevalence was reported as substantially increased in medical personnel
and decreased in smokers after the first wave in spring 2020, including in our population …

Background: Omega-3 fatty acids enhance immune response and modulate inflammation.
This study aimed to determine the relationship between omega-3 fatty acid status and the …

Background: Chile has achieved the highest coverage for vaccines against the SARS-CoV-2
virus worldwide. Objective: To assess the progression of immunity (natural and acquired by …

Using levels of neutralizing antibodies (nAbs), we evaluate the successful Chilean SARS-
CoV-2 vaccine campaign, which combines different vaccine technologies and heterologous …

Major sporting events were suspended during the most acute phase of the COVID-19
pandemic. Competitions are resuming with enhanced hygiene protocols and altered …

Chile is among the most successful nations worldwide in terms of its COVID-19 vaccine
rollout. By 31 December 2021, 84.1% of the population was fully vaccinated, and 56.1 …

Background: The robustness of sero-surveillance has delineated the high burden of SARS-
CoV-2 infection in children; however, these existing data showed wide variation. This study …

Background Multisystem inflammatory syndrome associated to Covid-19 (MIS-C) is one of
the most severe outcomes of SARS-CoV-2 in children. Covid-19 vaccines were successfully …