Timing home-tests for COVID-19 based on evolving SARS-CoV-2 loads and symptom onset
A study conducted in Georgia found that the peak viral loads of SARS-CoV-2 occur on the fourth or fifth day of symptoms, while the peak viral loads of influenza A occur on the second day of symptoms. This has implications for the timing of rapid antigen tests for COVID-19 and flu. The study suggests that the relationship between viral load and symptom onset is different in a highly immune population compared to earlier in the pandemic, highlighting the need for updated testing practices. In other news, the US Department of Health and Human Services has awarded up to $104 million for the development of diagnostic platforms to combat antibiotic-resistant bacteria, and the FDA has released finalized food safety guidance for sprout producers, aiming to reduce the risk of foodborne illness outbreaks associated with sprouts.