Covid-19: Do many people have pre-existing immunity?

Targets of T Cell Responses to SARS-CoV-2 Coronavirus in Humans with COVID-19 Disease and Unexposed Individuals

(2020) Alba Grifoni et al.   CELL

Cumulative incidence and diagnosis of SARS-CoV-2 infection in New York

(2020) Eli S. Rosenberg et al.   ANNALS OF EPIDEMIOLOGY

Prevalence of SARS-CoV-2 in Spain (ENE-COVID): a nationwide, population-based seroepidemiological study

(2020) Marina Pollán et al.   LANCET

SARS-CoV-2-specific T cell immunity in cases of COVID-19 and SARS, and uninfected controls

(2020) Nina Le Bert et al.   NATURE

Clinical and immunological assessment of asymptomatic SARS-CoV-2 infections

(2020) Quan-Xin Long et al.   NATURE MEDICINE

Selective and cross-reactive SARS-CoV-2 T cell epitopes in unexposed humans

(2020) Jose Mateus et al.   SCIENCE

Has Sweden’s controversial covid-19 strategy been successful?

(2020) Heba Habib   BMJ-British Medical Journal

SARS-CoV-2 T cell immunity: Specificity, function, durability, and role in protection

(2020) Daniel M. Altmann et al.   Science Immunology

Cellular immune correlates of protection against symptomatic pandemic influenza

(2013) Saranya Sridhar et al.   NATURE MEDICINE

Preexisting influenza-specific CD4+ T cells correlate with disease protection against influenza challenge in humans

(2012) Tom M Wilkinson et al.   NATURE MEDICINE

"Herd Immunity": A Rough Guide

(2011) P. Fine et al.   CLINICAL INFECTIOUS DISEASES

Pre-existing immunity against swine-origin H1N1 influenza viruses in the general human population

(2009) J. A. Greenbaum et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA