@article{202007.0352,
	doi = {},
	url = {https://doi.org/},
	year = 2020,
	month = {July},
	publisher = {Preprints},
	author = {Hagai Perets and Ruth Perets},
	title = {A Preceding Low-virulence Strain Pandemic Inducing Immunity Against COVID-19},
	journal = {Preprints}
}