"Virulent attacks" refers to aggressive and harmful actions or comments aimed at causing serious damage or harm to someone or something. It implies that the attacks are fierce, dangerous, and can spread rapidly. Full definition
Despite what the Conservatives have always maintained, public services are not inherently inefficient, but years of so - called reforms, continuous restructuring and top - down interference, combined with virulent attacks on public sector workers, have seriously damaged morale in the sector and virtually destroyed a vital public service ethos. (theguardian.com)
Indeed one reason why even the most virulent attacks on God give rise to no upheaval in the Muslim world, something that only insults to the Prophet and his Book are capable of doing, is because the former has suffered a kind of «death» while the latter has increasingly been divested of his metaphysical attributes. (blog.politics.ox.ac.uk)
Chairman Peter Booth Wiley virulent attack speech is a repulsive, bad American dream come true! (goodereader.com)