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Good morning … It's officially here: The Affordable Care Act's fifth open enrollment period.

What we're watching today: HealthCare.gov.

What we're watching this week: Energy and Commerce subcommittee hearing Thursday on federal oversight of dangerous pathogens. Brookings event Friday on policy answers to the opioid crisis.

Place your bets: How many people will select a plan during this open enrollment period? We're counting HealthCare.gov plus state exchanges, and plan selections, not effectuated enrollments. Send me your guesses: baker@axios.com