diff --git a/docs/api/covidcast-signals/nhsn.md b/docs/api/covidcast-signals/nhsn.md
index f5ebb829c..2fc89afd7 100644
--- a/docs/api/covidcast-signals/nhsn.md
+++ b/docs/api/covidcast-signals/nhsn.md
@@ -31,12 +31,21 @@ For reference dates in May 2024, NHSN received data from 78% of US EDs.
 State and nation-level values are pulled directly from the source; HHS-level values are aggregated up from the state level.
 
 
-| Signal                          | Description                                                                                                                                                                         |
-|---------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| `confirmed_admissions_covid_ew`              | Total number of patients hospitalized with confirmed COVID-19 over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week. **Earliest date available:** 2020-08-08                                                                                                     |
-| `confirmed_admissions_covid_ew_prelim`          | Total number of patients hospitalized with confirmed COVID-19 over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08  |
-| `confirmed_admissions_flu_ew`           | Total number of patients hospitalized with confirmed influenza over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week.  <br/> **Earliest date available:** 2020-08-08                                                                                       |
-| `confirmed_admissions_flu_ew_prelim`     | Total number of patients hospitalized with confirmed influenza over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08 |
+| Signal                                         | Description                                                                                                                                                                                                                                                                          |
+|------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `confirmed_admissions_covid_ew`                | Total number of patients hospitalized with confirmed COVID-19 over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week. <br/> **Earliest date available:** 2020-08-08                    |
+| `hosprep_confirmed_admissions_covid_ew`        | Total number of number of hospitals reporting new admissions with confirmed COVID-19 over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week.<br/> **Earliest date available:** 2020-08-08                                                                                                           |
+| `confirmed_admissions_covid_ew_prelim`         | Total number of patients hospitalized with confirmed COVID-19 over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08                                   |
+| `hosprep_confirmed_admissions_covid_ew_prelim` | Total number of number of hospitals reporting new admissions with confirmed COVID-19 over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08            |
+| `confirmed_admissions_flu_ew`                  | Total number of patients hospitalized with confirmed influenza over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week.  <br/> **Earliest date available:** 2020-08-08                  |
+| `hosprep_confirmed_admissions_flu_ew`          | Total number of hospitals reporting new admissions with confirmed influenza over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week.  <br/> **Earliest date available:** 2020-08-08     |
+| `confirmed_admissions_flu_ew_prelim`           | Total number of patients hospitalized with confirmed influenza over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08                            |
+| `hosprep_confirmed_admissions_flu_ew_prelim`   | Total number of number of hospitals reporting new admissions with confirmed influenza over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08     |
+| `confirmed_admissions_rsv_ew`                  | Total number of patients hospitalized with confirmed RSV over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week.  <br/> **Earliest date available:** 2020-08-08                        |
+| `hosprep_confirmed_admissions_rsv_ew`          | Total number of number of hospitals reporting new admissions with confirmed RSV over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Friday or Saturday of the following week.  <br/> **Earliest date available:** 2020-08-08 |
+| `confirmed_admissions_rsv_ew_prelim`           | Total number of patients hospitalized with confirmed RSV over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week. <br/> **Earliest date available:** 2020-08-08                                  |
+| `hosprep_confirmed_admissions_rsv_ew_prelim`   | Total number of number of hospitals reporting new admissions with confirmed RSV over the entire week (Sunday-Saturday). Only includes hospitalizations whose report was received before the Wednesday of the following week.  <br/> **Earliest date available:** 2020-08-08          |
+
 
 ## Table of Contents
 {: .no_toc .text-delta}
@@ -88,6 +97,10 @@ Only hospitals indicated as active reporters in NHSN are included.
 Between reference dates 2024-05-01 and 2024-10-31, reported hospitalizations may not be fully representative, since reporting was voluntary.
 See the [missingness section](#missingness) for more information about voluntary and mandatory reporting periods.
 
+Data for RSV from the pre-October 31, 2024 voluntary reporting period is particularly low quality. Only a tiny fraction of hospitals reported RSV-associated admissions such that they are undercounted by a factor of perhaps 100. For historical RSV-associated admissions, see the [CDC's RSV-NET](https://www.cdc.gov/rsv/php/surveillance/rsv-net.html) (not currently mirrored by Delphi).
+
+For earlier issue dates certain signals may not be available. The earliest issue date with all the current signals available is epiweek 202451
+
 Standard errors and sample sizes are not applicable to these metrics.