Five things to know:
1. The percentage of outpatient visits for influenza-like illness increased from 3.1 percent to 3.3 percent for the week ending Jan. 19, which is above the national baseline of 2.2 percent. All 10 regions reported influenza-like illness at or above their region-specific baseline level.
2. The CDC confirmed 4,851 positive respiratory specimens for influenza A and 99 positive specimens for influenza B for the week ending Jan. 19.
3. The CDC reported 4,262 laboratory-confirmed flu-associated hospitalizations from Oct. 1, 2018, through Jan. 19. The overall flu-associated hospitalization rate was 14.8 per 100,000 population.
4. Eighteen states experienced high influenza-like illness activity for the week ending Jan. 19. Ten states experienced moderate activity; eight states experienced low activity; and 14 states experienced minimal activity.
5. Thirty-six states reported widespread flu activity for the week ending Jan. 19. Eleven states reported regional flu activity; and three states reported local flu activity.
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