Follow the science? It’s not that easy when deciding when — or if — to reopen schools – Chicago Sun-Times*

It’s more complicated than any single number, several local and national infectious disease experts said. Some argue the metric the city is using — doubling rate, which would allow schools to reopen right now — might offer an incomplete look at Chicago’s epidemic. Yet every one of them says the threshold the teachers union is pushing — 3% test positivity, which likely won’t be reached for months — is outdated and not particularly useful.