The Biden administration said Thursday it would send out an additional 1.8 million doses of the Jynneos monkeypox vaccine if states adopt a new vaccination protocol, the White Houses latest effort to rein in the growing outbreak of the the disease before a slate of major LGBTQ events in the coming months.

The White Houses strategy relies on a new vaccination protocol that would stretch the countrys limited supplies of the vaccine. Patients would be given one-fifth as much per shot in an intradermal injection method rather than the traditional full dose, which is usually injected into the layer of fat beneath the skin.

States that agree to use the intradermal method and have used 90% of their current vaccine supply will be eligible to order more doses starting Monday.

The FDA authorized the new strategy last week and federal health agencies say the new protocol is just as effective at preventing monkeypox.

More shots in arms is how we get the outbreak under control, Robert Fenton, the coordinator of the White Houses monkeypox response, told reporters Thursday. This is important ... Its innovative, the way that we will bolster local efforts to meet people where they are and mitigate the spread of monkeypox.

There have been more than 14,100 cases of monkeypox in the U.S. since the outbreak first began in May, according to the Centers for Disease Control and Prevention. The disease primarily has been detected in men who have sex with men and spreads mainly through close physical contact.

So far, many gay and bisexual men have struggled to access vaccinations, with appointments booking up in hours and shots skewed towards wealthier white people with more flexibility to source them.

But the new vaccination strategy has already prompted some concern , chiefly from Bavarian Nordic, the maker of the Jynneos vaccine. The company sent a letter to Health and Human Services Secretary Xavier Becerra last week saying it had some reservations about the intradermal method, adding there is very limited data on the strategys safety. Officials there also said they worried patients wouldnt get their second doses, which are required to get full protection from monkeypox.