inverse vaccine noun [C]
UK /ˌɪn.vɜːs ˈvæk.siːn/ US /ɪnˌvɝːs vækˈsiːn/
a type of vaccine that stops the body from attacking and damaging its own healthy cells and tissues

It will take time before inverse vaccines are available for patients, but initial trials have already been conducted on people with coeliac disease, with encouraging results … If inverse vaccines could be developed for all autoimmune illnesses, it would be a real revolution, as we have said, because we would be able to switch off inappropriate reactions in a highly specific and definitive way.
[ibsafoundation.org, 28 September 2023]

zero-dose adjective
UK /ˌzɪə.rəʊˈdəʊs/ US /ˌzɪr.oʊˈdoʊs/
a zero-dose child is one who has never received any of the routine vaccinations that most children are given

Since 2019, there has been a dramatic increase in the number of zero-dose children globally due to COVID-19 disruptions, increased economic crises and conflict, and declines in vaccine confidence … To turn the tide on this unprecedented increase in zero-dose children, it is essential to know who and where these children are so we can reach every child with life-saving vaccinations.
[data.unicef.org, April 2023]

tarmac-to-arm adjective
UK /ˌtɑː.mæk.tuˈɑːm/ US /ˌtɑːr.mæk.tuˈɑːm/
tarmac-to-arm refers to the process involved in getting vaccines and other medicines delivered to the place where they are needed and given to the people who need them

According to assessments by the charity CARE, the average “tarmac-to-arm” delivery costs for a single vaccine dose is $9.97 in South Sudan, equivalent to 40% of the country’s per capita pre-pandemic expenditure on healthcare.
[pharmaceutical-technology.com, 22 June 2022]

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