First doses of measles-containing vaccine per 100 BCG doses, Tamil Nadu

First doses of a measles-containing vaccine (measles-rubella or measles) given to children aged 9–11 months in the month, per 100 BCG doses given in the same month. A rough continuity proxy for the infant schedule.

Numerator

Items 9.2.1 + 9.2.2: MR (or MR/MCV) 1st dose + measles 1st dose, children 9–11 months

Denominator

Item 9.1.2: BCG

Methodology

Source: HMIS Standard Report 'Data ItemWise Report for All India Across State', one file per month (hmis.mohfw.gov.in → Standard Reports → C2. Data Itemwise Monthly → 1. All India Across States), Total column = public + private facilities (equivalently rural + urban). Values are the facility reports aggregated by HMIS; IHO reads them as published and computes ratios from the stored components. (Item 9.2.1 + item 9.2.2) ÷ item 9.1.2 × 100, same month. Both measles items are summed because MR replaced measles vaccine state by state between 2017 and 2019; MR alone rises from 8 to over 100 per 100 BCG doses over that period, while the sum is stable. Values are stored as provisional; ratios with a denominator under 100 are marked low-sample.

Caveats

Different birth cohorts (BCG at birth, MCV1 at 9 months), and BCG is given where children are born, so the ratio exceeds 100 in many months and swings in small states and in campaign months (several states exceed 200 during the MR catch-up). Read the trend, not the level. HMIS data after May 2021 is not publicly released; MoHFW restricts newer months to logged-in users. All figures are marked provisional by the publisher, and MoHFW regenerates whole financial years (each file carries a 'Status As On' date), so values can be restated. HMIS counts services reported by facilities, by place of service rather than residence: a state that treats many patients from its neighbours shows higher counts and ratios. Private-sector reporting is incomplete and uneven across states. April 2020 onward reflects the COVID-19 lockdowns and service disruption.

Comparability

Item 9.2.1 is labelled 'MR' until March 2020 and 'MR/MCV' from April 2020. Every month published here uses the HMIS reporting format introduced in April 2017 (the earlier format is not loaded). The files changed physical form (BIFF .xls for Apr–May 2017, SAS HTML for Jun 2017 – Mar 2020, .xlsx from Apr 2020) but not content. Geography: Jammu and Kashmir includes Ladakh until March 2020; Ladakh is reported separately from April 2020. Dadra and Nagar Haveli and Daman and Diu are published separately up to December 2019 and as the merged UT from April 2020; January–March 2020 is not published for either, because the files still report the two former UTs after the 26 January 2020 merger. Until March 2020 the files also carry columns for the Ministry of Defence's and Ministry of Railways' own facilities; they count in All India but belong to no state. If later months become public, two further format changes apply (April 2023: in-facility and outreach reported separately; April 2025: a revised format with renumbered items); the pipeline checks every item's label and will stop rather than mix formats.