`vaers_events_by_vaccine`

Pack: vaers · Endpoint: https://gateway.pipeworx.io/vaers/mcp

VAERS report counts and severity breakdown (died / life-threatening / hospitalized / disabled / ER visit) by vaccine, for the requested year range. Pass vaccine as the VAERS vax_type code (e.g. “COVID19”, “FLU4”, “HPV9”, “VARCEL”, “MMR”) to get that vaccine’s counts; omit it to browse the top vaccines ranked by report volume, which doubles as a way to discover valid codes. Optionally narrow to one manufacturer (substring match, e.g. “PFIZER”, “MODERNA”). Answers “how many VAERS reports mention the COVID-19 vaccine”, “which vaccine has the most reported deaths in VAERS”, “Pfizer vs Moderna VAERS report counts”.

Parameters

Name	Type	Required	Description
`vaccine`	string	no	VAERS vax_type code, e.g. “COVID19”, “FLU4”, “HPV9”, “MMR”, “VARCEL”. Omit to see the top vaccines by report count.
`manufacturer`	string	no	Manufacturer substring, e.g. “PFIZER”, “MODERNA”, “MERCK”. Optional.
`year_from`	number,string	no	Earliest report-received year to include (data covers 1990-2026).
`year_to`	number,string	no	Latest report-received year to include.
`limit`	number,string	no	Max rows (1-200, default 20).

Example call

Arguments

{
  "vaccine": "COVID19",
  "year_from": 2021,
  "year_to": 2022
}

curl

curl -X POST https://gateway.pipeworx.io/vaers/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"vaers_events_by_vaccine","arguments":{"vaccine":"COVID19","year_from":2021,"year_to":2022}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('vaers_events_by_vaccine', {
  "vaccine": "COVID19",
  "year_from": 2021,
  "year_to": 2022
});

More examples

{
  "limit": 5
}

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "vaers": {
      "url": "https://gateway.pipeworx.io/vaers/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

vaers_events_by_vaccine