What is the ruling on saying: "Humanity against Corona," "Humanity will triumph over it," and "We will declare humanity's war against it," phrases that are widespread during the Corona crisis?

It is preferable to avoid the phrase "the invincible army" because of the corrupt meanings it may imply, such as being deluded by human power and dispensing with God, even if the speaker does not intend that. One should use phrases that demonstrate one's need for God and the dependence of matters on His will, for Allah the Almighty says: ﴿And never say of anything, 'Indeed, I will do that tomorrow,' Except [by adding], 'If Allah wills.' And remember your Lord when you forget.﴾ In this verse, there is a prohibition against speaking of the unseen and attributing an action to one's own will independently. Moreover, mentioning Allah's will brings ease to the matter and invokes blessings. There is no harm in cooperating with non-Muslims for the benefit of Muslims.