Pathogen natural history, epidemiological knowledge, human behavior and epidemic progression determine whether symptom screening and questionnaires are effective barriers to geographic spread of infection by travelers.

Even in the best-case scenario, screening for COVID-19 misses well over half of infected travellers.

Risk factors for SARS-CoV-2 infection in healthcare workers included caring for Covid-19 patients, Black or Asian ethnicity, and Covid-19-positive household contacts, whereas a bundle of PPE-related measures protected ICU staff.

Outbreaks of SARS-CoV-2 transmission in a hospital environment show evidence of superspreading, with 80% of infections caused by 21% of infected individuals.

3% of >1,000 asymptomatic healthcare workers in their workplace tested positive for SARS-CoV-2, suggesting that comprehensive screening programmes are vital to prevent acquisition of COVID-19 in hospitals.

Persistent Coxiella burnetii infected abdominal aorta aneurysms are associated with an immune-suppressed microenvironment.

Llama-derived single-domain antibodies, formatted as bispecific antibodies with human Fc domains, reduce and prevent bunyavirus-induced morbidity and mortality in mice upon prophylactic and therapeutic administration.

Applying deep learning technology for the large-scale curation of symptoms from unstructured EHR clinical notes accurately predicts the differential signals of COVID-19 diagnosis over the week preceding typical PCR testing.

Compared with the approach isolating COVID-19 patients for a fixed period, the approach using repeated PCR testing mitigates unnecessarily lengthy isolation of patients while minimizing the risk of further transmission.