This says the fatality rate in the young is .2 and it seems to include non-confirmed cases. But I've read that it's more like 0 including ICU and fatal cases. It was a major msm article from last week that didn't even include the 19 and under statistics for ICU/fatalities because they are so low.
Coronavirus Age, Sex, Demographics (COVID-19) - Worldometer
And here's the CDC stats from 2/1 to 3/28. The chart doesn't transfer over nicely, but the deaths are the very last number and include deaths "with pneumonia and COVID-19" So one death under the age of 25 years.
Provisional Death Counts for Coronavirus Disease (COVID-19)
* * *
Table 2. Deaths involving coronavirus disease 2019 (COVID-19) and pneumonia reported to NCHS by age group, United States. Week ending 2/1/2020 to 3/28/2020.*
Data as of 4/3/2020
Age group All COVID-19 Deaths (U07.1)1 Deaths from All Causes Percent of Expected Deaths2 All Pneumonia Deaths3 (J12.0–J18.9) Deaths with Pneumonia and COVID-193 (J12.0–J18.9 and U07.1)
All ages 1,150 446,778 86 24,741 469
Under 1 year 0 2,396 63 19 0
1–4 years 1 489 74 23 1
5–14 years 0 713 71 26 0
15–24 years 0 4,036 78 73 0
25–34 years 8 8,424 83 189 3
35–44 years 33 12,076 85 388 8
45–54 years 75 23,299 77 983 26
55–64 years 123 56,398 83 2,824 50
65–74 years 265 87,567 88 4,778 91
75–84 years 331 110,592 88 6,590 145
85 years and over 314 140,788 84 8,848 145
Provisional Death Counts for Coronavirus Disease (COVID-19)