---
type: "Bill"
title: "establishing a commission to study the role of clinical diagnosis and the limitations of serological diagnostic tests in determining the presence or absence of Lyme and other tick-borne diseases and available treatment protocols, and appropriate methods for educating physicians and the public about the inconclusive nature of prevailing test methods and available treatment alternatives."
description: "establishing a commission to study the role of clinical diagnosis and the limitations of serological diagnostic tests in determining the presence or absence of Lyme and other tick-borne diseases and available treatment protocols, and appropriate methods for educating physicians and the public about the inconclusive nature of prevailing test methods and available treatment alternatives."
jurisdiction: "us/states/nh"
legislature: "New Hampshire General Court"
session: "2020"
identifier: "HB 490"
citation: "New Hampshire HB 490 (2020)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: []
version_count: 2
action_count: 24
vote_count: 0
first_action: "2019-01-15"
last_action: "2020-07-17"
source: "openstates"
source_identifier: "ocd-bill/b0b881e3-b1a8-42d9-a31f-82437449b67b"
source_url: "http://www.gencourt.state.nh.us/bill_Status/bill_status.aspx?lsr=0518&sy=2020&sortoption=&txtsessionyear=2020"
source_hash: "a1f375fb0492f72250ef9704392d9d2015ae3ca1116288b3af9f17b28e1c3a4d"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-nh"]
---

# New Hampshire HB 490 (2020) — establishing a commission to study the role of clinical diagnosis and the limitations of serological diagnostic tests in determining the presence or absence of Lyme and other tick-borne diseases and available treatment protocols, and appropriate methods for educating physicians and the public about the inconclusive nature of prevailing test methods and available treatment alternatives.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Amendment #2020-1542e** (committee substitute) — [source](http://www.gencourt.state.nh.us/bill_status/billText.aspx?sy=2020&id=2020-1542e&txtFormat=amend)
2. **latest version** (committee substitute) — [source](http://www.gencourt.state.nh.us/bill_status/billText.aspx?sy=2020&id=508&txtFormat=html)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2019-01-15** Introduced 01/03/2019 and referred to Health, Human Services and Elderly Affairs HJ 3 P. 17 `introduction, referral-committee`
- **2019-01-16** Public Hearing: 01/23/2019 01:00 pm LOB 205
- **2019-01-30** Division II Subcommittee Work Session: 02/07/2019 10:00 am LOB 205
- **2019-01-30** Executive Session: 02/07/2019 01:00 pm LOB 205
- **2019-02-12** Committee Report: Ought to Pass with Amendment # 2019-0062h (NT) for 02/27/2019 (Vote 21-0; CC) HC 13 P. 11 `committee-passage-favorable`
- **2019-02-27** Amendment # 2019-0062h (NT): AA VV 02/27/2019 HJ 6 P. 16
- **2019-02-27** Ought to Pass with Amendment 2019-0062h (NT): MA VV 02/27/2019 HJ 6 P. 16 `passage`
- **2019-03-18** Introduced 03/14/2019 and Referred to Health and Human Services; SJ 9 `introduction, referral-committee`
- **2019-03-28** ==TIME CHANGE== Hearing: 04/02/2019, Room 101, LOB, 02:00 pm; SC 16
- **2019-04-11** Committee Report: Rereferred to Committee, 04/18/2019; Vote 5-0; CC; SC 18
- **2019-04-18** Rereferred to Committee, MA, VV; 04/18/2019; SJ 13
- **2019-11-18** Committee Report: Referred to Interim Study, 01/08/2020; Vote 5-0; CC; SC 47
- **2020-01-08** Sen. Bradley Moved to Remove HB 490 from the Consent Calendar; 01/08/2020; SJ 1
- **2020-01-08** Sen. Sherman Moved to refer HB 490 back to Health and Human Services, MA, VV; 01/08/2020; SJ 1
- **2020-02-06** Hearing: 02/11/2020, Room 103, SH, 01:00 PM; SC 6
- **2020-02-11** Committee Report: Ought to Pass with Amendment # 2020-0611s, 02/13/2020; SC 6A `committee-passage-favorable`
- **2020-02-13** Committee Amendment # 2020-0611s, AA, VV; 02/13/2020; SJ 4
- **2020-02-13** Ought to Pass with Amendment 2020-0611s, MA, VV; OT3rdg; 02/13/2020; SJ 4 `passage`
- **2020-06-11** House Concurs with Senate Amendment (Rep. Weber): MA DV 274-56 06/11/2020 HJ 9 P. 36
- **2020-06-29** Enrolled Bill Amendment # 2020-1542e Adopted, VV, (In recess of 06/16/2020); SJ 9
- **2020-06-30** Enrolled Bill Amendment # 2020-1542e: AA VV 06/11/2020 HJ 9 P. 42
- **2020-07-06** Enrolled (In recess 06/29/2020); SJ 9
- **2020-07-06** Enrolled 06/30/2020 HJ 10 P. 70
- **2020-07-17** Signed by Governor Sununu 07/14/2020; Chapter 9; I. Sec. 3 Eff: 11/01/2021 II. Rem. Eff: 07/14/2020 `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/b0b881e3-b1a8-42d9-a31f-82437449b67b`. Confidence: reported (aggregated from official New Hampshire legislature records).